CN1079685C - Filter cloth and filter - Google Patents
Filter cloth and filter Download PDFInfo
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- CN1079685C CN1079685C CN96197202A CN96197202A CN1079685C CN 1079685 C CN1079685 C CN 1079685C CN 96197202 A CN96197202 A CN 96197202A CN 96197202 A CN96197202 A CN 96197202A CN 1079685 C CN1079685 C CN 1079685C
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- filter cloth
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Abstract
The present invention relates to a filtering fabric which comprises at least one bottom layer and one filtering layer. The present invention is characterized in that the ratio T/L of the thickness (T) of the filtering layer to the fiber length (L) of fiber bundles formed into the filtering layer is 0.02 to 0.7, and the total sum of the projected area of fibers on the surface of the bottom layer is 8 to 350 times larger than the surface area of the bottom layer. The filtering fabric is characterized in that the filtering fabric is composed of at least one bottom layer and one filtering layer, wherein the filtering layer is mainly composed of the fiber bundles whose fiber curling ratio is larger than 5%. In addition, a belt type solid-liquid separating machine is characterized in that the belt type solid-liquid separating machine is composed of at least one following mechanism: a mechanism which causes the filtering fabric of the present invention installed on multiple rollers to move around the rollers, a mechanism which supplies water which is not filtered to an oblique belt, a mechanism used for sucking the supplied water which is not filtered from the back of the belt, a mechanism which pressurizes filter cakes to cause the filter cakes formed on the belt to be dewatered, a mechanism for scraping the dewatered filter cakes, and a mechanism used for cleaning the belt. In addition, a filtering machine is characterized in that the filtering machine is composed of at least one following mechanism: a mechanism which is provided with the filtering fabric of the present invention around a drum-shaped or dish-shaped structural component to separate the structural component into an interior and an external, a mechanism for supplying water which is not filtered to the separated external or the separated interior to make the water which is not filtered pass through the filtering fabric, a mechanism for cleaning the filtering fabric from the supplying side of the water.
Description
Technical field
The present invention relates to a kind of filter cloth, it has bottom that constitutes base fabric and the filter course that comprises fibre bundle, and the root of fibre bundle is in bottom.The invention still further relates to a kind of filter cloth, wherein filter course mainly is made up of fibre bundle, and fibre bundle has specific fiber crimp ratio.More specifically be, the present invention relates to a kind of new filter cloth, it has good particulate to capture performance, cleans restorability, size stability, and good durability and good water penetration can be preferably used for the separation of suspended material.The invention still further relates to the filter of a kind of belt solid-liquid seperator and this filter cloth of application.
Background technology
As the filter of the various particulates that are used for being comprised in filtering gas such as air or liquid such as water or all kinds of solvents, the filter cloth made by woven fabric and non-weaving cloth of extensive use uses various fibers in the cloth.Plain weave, the fabric of the network of twill and forging line particularly,, have been used based on so-called three foundation weave for the suspended solid in the filtered water.In addition, for example in Japanese patent publication S62-13046 and Japanese patent publication H2-47244, disclose and made fabric napping making filter cloth, wherein made parallel, thereby form the fine hair of superfine fibre from the teeth outwards with ultra-fine fiber.In addition, as the filter that fibre bundle is arranged from the teeth outwards, known to Japanese Utility Model patent announcement H2-36568, the utility model patent of Japanese Utility Model patent announcement H5-34730 and Japanese unexamined is announced among the H4-14112 and has been announced various filters and filter cloth.Announce the knitted fabric that discloses velour among H6-27672 and the Japanese Utility Model patent announcement H6-30874 and matte is arranged in the Japanese Utility Model patent, wherein crimped filaments and the weaving of unconvoluted multifilament are in the same place.In Japanese patent publication H1-40136 and Japanese unexamined patent publication S58-120834, the textile of being made by velour is disclosed, wherein make parallel with the filament of false twisting.
But, because the filter cloth by woven fabric that uses fiber or the routine that knitted fabric is made makes the water of filtered by the gap in the network of fiber, particle capture contained in the water with filtered just is difficult to be captured thereby can pass through less than the particle of grid intermediate gap size in grid.Various filter clothes have been arranged, in order to catch the particle of small particle diameters, do the size of grid very little thereby increase the density of weaving, but become very little at this filter cloth intermediate gap ratio like this, the porous difficulty that falls under water that can filter, and the dirt of very fast generation knot can not be carried out filtration.Also have various filter clothes, the fiber or the silk that wherein will constitute woven fabric are done very carefully, its purpose is to increase granule and collects performance, but produce a problem like this, in a single day particle deposits in the gap between the fiber, even adopt backwash or similar method also to be not easy it is washed off, and the very fast generation of the dirty meeting of knot.Because silk or fiber are very thin, the intensity of cloth is just low in addition, and its durability is also just poor.On the other hand, with the filter cloth of knitted structure, so that the percentage elongation of knitted fabric is very big size stability is just very poor.Also have a problem to be in addition, because filter cloth is easy to distortion, the gap just changes very greatly as a result, and the particle diameter of the particulate that can filter out also just changes, and is difficult to obtain stable strainability.If filter cloth with non-woven structure, because they are three-dimensional structures, relatively thick and close, so the collection performance of particle is good, but the pressure loss is also big, also have because be difficult in the three-dimensional grid remove when in a single day particle is captured in, so the recovery of filter cloth is a problem, their usability again is very poor.Because be easy to distortion when they are added upper stress, their dimensional stability is also very poor in addition.In Japanese patent publication S62-13046 and Japanese patent publication H2-47244 in the disclosed filter cloth, because the length of fine hair is short and the fine hair amount is also few, so the filtering performance of particulate is had certain limitation.In addition, there is fiber to be drawn out looping because constitute the surface layer part of the superfine fibre bundle of parallel,, and has the dirty tendency of knot takes place so particulate is caught by these parts, and, performance recovery is difficult to effectively by cleaning and similar approach because be difficult to remove them in case deposition goes up particulate.Even increase the number of times of napping operation, because the fine hair limited amount that increases, this is not the effective ways that increase particulate filtering performance.On the contrary, owing to the increase along with the napping number of operations, the fiber that constitutes parallel is cut off everywhere, so the intensity of parallel reduces, will tear in the warp direction generation of filter cloth after short-term is used, and only may obtain the very poor filter cloth of durability.Announce among the H2-36568 with resin base fabric and fine hair are glued together, but resin to have the tendency that leaks into fine hair top in the disclosed filter cloth in the Japanese Utility Model patent, cause bonding inhomogeneously, be difficult to the control resin and brush equably.As a result, some zones of the fibre bundle of resin-bonding become the hole because of seepage of resin to their top, just can not carry out the capture of particulate in these zones, and they must be used for capturing the particle of bulky grain diameter as filter cloth.In addition, because they are the filters that are used for air purifier, can not come filter liquide with them fully.Announce disclosed filter cloth among the H5-34730 in the Japanese Utility Model patent, wherein the fine hair end be bend and separate, but because in order to prevent the fine hair lodging, the essential quite thick textile fabric that uses tens dawn numbers, and because a lot of gaps are arranged between fine hair, the dust catching efficiency of the particle of small particle diameters is very low.In addition, because it is the control of dust filter cloth that is used for air cleaning, can not come filter liquide with it fully.Utility model in Japanese unexamined is announced disclosed filter cloth among the H4-14112, because the knitting relatively substrate of the fiber that is standing is vertical substantially, the speed that can be passed through by the particle of the filtering of fiber own is very low, and owing to particle enters between the vertical stand-up fiber together, so the dirty tendency of generation knot is just arranged in the incipient stage of filtering.When particle diameter during, just produce a problem, because the particle that enters between the upright fibres is not booked and by these rings, so the filtering poor performance of particulate at the mesh of knitting substrate less than the size of knitting substrate ring.In addition, when upright fiber can lodge during filtering,, expose knitting substrate in a lot of places, so restricted to the increase of filtering performance because lodging can take place in all directions.
Disclosed pile fabric and knitted fabric are used to make clothes and cover for seat in Japanese Utility Model patent announcement H6-27672 and Japanese Utility Model announcement H6-30874, have good quality, and glossy, wherein fine hair is near uprightly not being used as filter cloth fully.In Japanese patent publication H1-40136 and Japanese unexamined patent publication S58-120834, the weaving method that uses the false twisting parallel is disclosed, but because these are velours, wherein fine hair separately is independently, they are different from filter cloth of the present invention fully, also have these velours to be mainly used in to manufacture clothes and are not used in filter cloth.
Disclosure of an invention
A purpose of this invention is to solve the problems referred to above that are associated with conventional filter cloth and a kind of new filter cloth is provided, it has good particulate to capture performance, clean restorability and durability, another purpose provides a kind of new filter cloth, its particulate filtering performance is very high when filter liquide, and very high water penetration and antifouling durability are arranged, good dimensional stability and long service life, it can be preferably used for the separation of suspended solid.Further purpose of the present invention provides a kind of belt solid-liquid seperator and filter of equipping this filter cloth, this filter cloth has good particulate filtering performance, clean restorability, durability, filter cloth belt transmits stability and filter process stability, is characterized in that these two characteristics that oppose mutually of particulate filtering performance and water penetration are all good.
Substantially reached purpose of the present invention by following structure:
' a kind of filter cloth comprises an at least one bottom and a filter course, wherein the ratio T/L of the fibre length (L) of thickness of filter course (T) and formation filter course fibre bundle is 0.02 to 0.7, and the projected area summation of fiber on bottom surface is 8 to 350 times of bottom surface area '; ' a kind of belt solid-liquid seperator comprises following at least a mechanism, one installs on many running rollers and the mechanism that transmits the band that uses above-mentioned filter cloth, one is used for supplying with the mechanism of the water of filtered on this band sloping portion, one is used for aspirating from the rear side of band the mechanism of the water of the filtered that supplies, to the filter cake that forms pressurizes and the mechanism of dehydration with going up, a mechanism and that scrapes the filter cake of dehydration is used to clean the mechanism of this band '; ' comprise following at least a mechanism with a kind of filter, there is above-mentioned filter cloth to be contained on the drum or the structure member of plate-like and is divided into inside and outside mechanism, the water of filtered is supplied with separate outside or inner, and make the mechanism of the water of filtered by filter cloth, the mechanism and one that the opposite side of one never filtered water supply side and/or filter cloth cleans this filter cloth is used to discharge the mechanism by cleaning the condensed water that produces.’
Brief description of the drawings
Fig. 1 is a side view of measuring the equipment of filter cloth water penetration coefficient.
Fig. 2 is the side view that shows the filter mechanism of belt solid-liquid seperator.
Fig. 3 is the side view that shows a mechanism of rotary drum continuous filter.
Fig. 4 is the key diagram of how to try to achieve the fiber crimp ratio.
The explanation of label
1. go up screen pipe 2. filter clothes
3. wire netting 4. graduated cylinders
5. pump 6. distilled water
7. anchor clamps 8. cocks
9. descend screen pipe 10. filter clothes
11. the water tank of unfiltered water 12. unfiltered waters
12a framework 13 has the transfer roller of mirror finish
13a pressure roller 13b live-rollers
14. filter cake 15. surface clean injectors
Wash injector 16. clean osculum 17. back ofs the body
18. decompression air blast 19. scrapers
20. water 21. filter clothes that filter
22. the water that the water 23. of filtered filters
24. condensed water 24a. concentrates water pond
25. flushing water pump 26. back ofs the body are washed injector
27. surface clean injector 28. rotary drums
29. loss water-head 30. fibers
31. straight line ab 32. straight line cd
33. crosspoint
The best mode that carries out an invention
The fiber of fibre bundle that can be used to constitute filter course of the present invention is with there being the polymer of fibre forming property to make, and its example comprises polyamide and aromatic polyamide, as nylon 6, nylon 66, the copolymer of nylon 12 and polyamide, polyester such as polyethylene terephthalate, the copolymer of polyethylene terephthalate; The PA polybutyleneterephthalate, PA polybutyleneterephthalate's copolymer; Polyolefin such as full-aromatic polyester, polyethylene and polypropylene, and polyurethane, polyacrylonitrile, polyvinyl chloride, polyvinyl alcohol, polyvinyl, polyvinylidene chloride, poly-bisulfites, poly-ethylene fluoride, the copolymer of poly-ethylene fluoride and polyoxymethylene.Can adopt combination such as the core and the sheath structure of the made composite fibre of the various combinations of these polymer and each fibrid, multicore and sheath structure, island structure or bimetal structure or analog according to the application.
About the thickness of fiber, the 2 preferably thinner relatively dawn or littler, but capture performance in order to increase particulate, and 0.001 to 1 dawn is more desirable, keeps the durability of fiber simultaneously in order to increase particulate capture performance, and 0.03 to the 0.5 higher dawn is still more more preferably.
Fibre bundle of the present invention is by arrange different types of a plurality of fiber with the form of bundle or will make with a kind of a plurality of fiber alignment together, at least one end of each fibre bundle of preferably forming filter course is a free end, and the other end of fibre bundle or middle part and bottom are in aggregates.Free end is a kind of like this state, this end of fiber be unclamp and can move freely.Preferably fibre bundle opens to its this end from its root, and for example crooked and tilt on the length direction of filter cloth or width in predetermined direction.
Tangle by the silk with bottom in the end of fibre bundle or the middle part of fibre bundle, bonding with binding agent, and heat merges, and ultrasonic wave is bonding or these combination and bottom is in aggregates.Preferably the structure of filter cloth is, the structure of its bottom weaves, and the root of the fibre bundle of filter course is together entangled to each other at three places and bottom parallel and/or warp at least, because fibre bundle is not easy to drop out so in use.Integral part preferably is arranged on the bottom surface regularly, even but they had better not have some regional fibre bundle sparse when being irregular alignment, the zone that has even do not have fibre bundle, these zones are influential to strainability, and integral part should be arranged on the bottom surface equably.
In order to reach projects of the present invention, the ratio of T/L is 0.02 to 0.7 to be essential, L (mm) is the place of the fiber of fibre bundle from fibre bundle and bottom overall fixed, the average length counted of bottom highest face temperature position just, and T (mm) is the thickness of filter course.When T/L less than 0.02 the time, particulate captures poor performance, can not catch a lot of particulates in filter course, or filter course is too close and obstruction soon, so this neither be preferred.When it greater than 0.7 the time because in the surface portion of filter course, almost can not filter out particulate, and be easy to enter into filter course inside, directly by and can not stop up, so can not obtain very high rejection rate, so this is not preferred.In addition, when it greater than 0.7 and bottom when compact structure is arranged, enter into inner fine build-up and get up to form knot dirty, even when cleaning, entered inner particulate and be difficult to wash off, it is poor that it cleans restorability, so this is not preferred.Preferably the value of T/L is 0.02 to 0.6, more preferably 0.02 to 0.5.When the fiber of filter course is 0.5 dawn or more hour, 0.02 to 0.25 is particularly preferred.
When all fibres of filter course of the present invention in one plane came into line, the summation of the projected area of each fiber was 8 to 350 times of filter cloth respective area on this plane, and this point is essential.
When it during less than 8 times, fiber is topped just insufficient to bottom surface, just carries out the capture of particulate unsatisfactorily, rejection rate is low, because the amounts of particles of catching in filter course is few, this just produces a problem, it is dirty that knot Once you begin takes place, and filter pressure can raise rapidly.In addition, on the other hand when it during greater than 350 times, the quantity of fiber is too many in filter course, water penetration just sharply descends, manageable amount reduces, thereby also can not handle effectively.From 10 to 250 times, the balance by high rejection rate and high water penetration can obtain better result.
In addition, in the present invention in order to catch especially little particle, be necessary to make filter course mainly by fiber crimp than be 5% or higher fibre bundle make.When the fiber crimp ratio was lower than 5%, the fiber of forming fibre bundle was easy to be focused at mutually together, makes fiber can not fully cover the surface of filter cloth, forms the gap between fibre bundle, and the capture of particle can not be satisfactory.On the other hand when fiber crimp when too high, the mutual entanglement of fiber is too strong, fibre bundle forms piling up of pencil, makes fiber become insufficient again to the covering on filter cloth surface, depends on various conditions, and the various situations that the granule capturing performance descends may take place.Open and between fiber, form suitable space in order to reduce to assemble and twine the relatively poor fibre bundle that is caused by fiber, thereby improve the granule capturing performance, preferred fiber crimp ratio is 10% to 95%, and the fiber crimp ratio with 15% to 90% can obtain preferred result.
In addition, filter course preferably mainly is made up of at least two types fibre bundle, between them fiber crimp than difference have 10% or more.Fiber crimp has following several than differentiated form: (1) one bundle fiber is dissimilar fibrous by two kinds, the fiber crimp of these two types of fibers is than different, (2) the fiber crimp ratio is different between each fibre bundle, (3) both of these case has, according to using and required performance is selected a kind of form of the best.When needs were caught particulate, the form of (1) was suitable.When needs are caught bigger particle.When its average particulate diameter surpassed 25 μ m (micron), the form of (2) and (3) was preferred.When the difference of fiber crimp ratio less than 10% the time, the effect that difference produced of fiber crimp ratio is not easy to show.Fibre bundle when at least two types, the difference of fiber crimp ratio is 10% or when higher between them, preferably the fiber crimp of at least two types of fibre bundles is than all greater than 5%, and the fiber crimp that also can use at least a types of fibers bundle in limited range is than being combination less than 5%.
In order to obtain this fiber crimp ratio, be easy to reach by silk false twisting processing.Processing do not had special restriction, but for example work as a silk false twisting and add man-hour, with a halved belt or bunching machine, carry out 300 meters/minute of silk speed by following condition, 210 ℃ of temperature of heating plate phase I, 190 ℃ of second stage, 110 ° of the bunching machine angles of the crossing, band/silk velocity ratio 1.39, for example be adjusted to 1.005 and readjust the glut rate to 5% the time when false afterturn draw ratio, can obtain fiber crimp than the false twist yarn that is 55.7%.
In addition, in order to reach projects of the present invention, filter course is that 2 to 45% fibre bundle is formed by crimp percent preferably, and crimp percent is 2 to 35% to be preferred, and crimp percent is 2 to be to be more preferably to 25%.For example can obtain the fiber crimp ratio when crimp percent is 3.2% is 55.7%.Crimp percent defines in " definition of each parameter " below.
The number of fibre bundle should be definite like this on bottom surface, and when because the radical deficiency, the gap is too big between each root, and the part bottom region that produces these gaps can not be by complete when topped, unlikely the degenerating of capture performance of particle.In addition, on the contrary, too many when radical, the gap is too narrow between each root, and the resistance that passes through of gas and liquid just increases, and the pressure loss uprises, and manageable quantity also reduces.In addition, enter between the fibre bundle and fibre bundle in particle be difficult to remove, the restorability of filter cloth descends.Therefore, the frequency that occurs in bottom surface of fibre bundle is preferably 40 to 900 pieces/centimetre
2When this number is 50 to 500 pieces/centimetre
2The time result that can obtain being more preferably.
The total denier of every fibre bundle of filter course, resemble the density of fibre bundle, also should be definite like this, make that the gap portion of bottom can be by topped, be further noted that on the other hand guarantee to make by resistance not because fibre bundle is too thick and the bundle root between too narrow the increasing in gap, therefore the pressure loss can not increase yet.According to the application target of required performance and filter cloth and in fibre bundle the thickness of used fiber, can change the total denier of each fibre bundle of filter course, but 50 to 1500 dawn were preferred.When the fibre number of forming fibre bundle during greater than 2 dawn, 50 to 750 is preferred, and when the fiber of forming fibre bundle during less than 1 dawn, 100 to 1500 dawn were preferred.Preferably the fibre bundle of filter course is used a kind of composite fibre, and this fiber is made ultra-fine fiber by in manufacture process some component being removed with the method for dissolving or separation.In this case, because the size of original composite fibre is greater than 2 dawn, thereby fibre bundle preferably makes manufacture process be easy to less than 750 dawn.In addition, the number of every intrafascicular fiber is the value that fiber number determined by used fiber in the total denier of fibre bundle and the fibre bundle, but 50 to 15000 fibers of every bundle are preferred, and 150 to 15000 fibers are preferred.If with 0.5 dawn superfine fibre, 300 to 15000 fibers of every bundle, and with 0.2 dawn superfine fibre, 500 to 15000 fibers of every bundle are particularly preferred.
When the length of filter course fiber becomes too in short-term, because the fiber number that can be used to filter diminishes, so the capture performance of particle descends.In addition, because fiber becomes and is difficult to crookedly, vertical stand-up is tended to together on the surface of filter course in the end of fiber, particle packing between vertical stand-up fiber together, thereby the dirty tendency of knot is arranged, make and clean restorability and also descend.On the other hand, when the fibre length of filter course became oversize, the granule capturing performance was good, but the resistance that gas and liquid pass through becomes big, thereby manageable quantity is also reduced.In addition, fiber can be entangled to each other and be tended to form the group of cotton knot shape when filtering.Owing to these reasons, the length of filter course fiber preferably 2mm to 20mm (millimeter).When length is the result that 2mm can obtain being more preferably during to 15mm.Here the fibre length of quoting is the place from fibre bundle and bottom overall fixed, and just the highest face temperature position of bottom is to the average length of free-ended fibre bundle fiber.
Produce excessive distortion for fear of filter cloth when standing strong pulling force, be preferably lower than 10% at the percentage elongation of length direction and width.Here the percentage elongation of quoting is measured under each standard conditions, with width is that 3 centimetres strip test piece makes a sign every 20 centimetres, at length direction test piece is added load 12kgf (kilogram), at its width test piece is added load 6kgf, after 90 minutes, measure the length between the mark.Here available following formula calculates percentage elongation:
÷ a * 100% of percentage elongation=(b-a)
A is the length between the mark when test piece being added initial load 100gf (gram force) in the formula, and b adds that load was still adding the length between the mark when loading afterwards in 90 minutes.Magnify for fear of the mesh of bottom strainability is descended thereupon, be more preferably less than 8%, also be more preferably less than 6% at the percentage elongation of warp direction.Percentage elongation on width and its value of length direction comparison is slightly higher allows, in any case but be good less than 9% preferably, be more preferably less than 7%.
For fear of the excessive distortion of filter cloth and obtain the filter cloth of good dimensional stability, recommend bottom mainly to use this fiber, its initial tensile modulus of measuring with JIS L1013 method is greater than 250kgf/mm
2(kilogram/square millimeter) is more preferably greater than 300kgf/mm
2, being more preferably is greater than 350kgf/mm
2In addition, the shape of fiber, the rectilinear form that is difficult for elongation has stretchy structure such as false twist yarn better than crimped fibre.Also have, for the filter cloth of production excellent size stability, the structure of bottom is preferably woven.In actual filtration, when only not having wire netting or porous plate to be placed on the filter cloth downstream to filter with filter cloth, with knitting or non-woven filter cloth because the expansion of shape and extend that filter cloth just is easy to be out of shape under less pulling force.In addition, the apparent density of filter cloth preferably 0.15 arrives 0.6gf/cm
3(gram force/cubic centimetre).Performance density (the gf/cm of filter cloth
3) be weight (gf/m by every square metre of filter cloth
2) divided by the thickness T of filter cloth
1The unit of mixing and obtaining again, this thickness is measured by the method that provides in the parameter-definition (2), will further discuss below.Density is too low when showing, and the capture performance of particulate is unsafty so, water penetration variation when it is too high.For the balance particulate captures performance and water penetration, the performance density of filter cloth preferably 0.2 arrives 0.6gf/cm
3Apparent density 0.25 to 0.5gf/cm
3Be preferred.
When separate suspended solid, for example as showing among Fig. 2, suspended sediment concentration is greater than hundreds of ppm (1,000,000/) in the water of its filtered, use a kind of belt solid-liquid seperator of structure, wherein band is to make with filter cloth of the present invention, transmits the separation of suspended solid in the water that this band carries out filtered, this machine has good performance characteristic, for example the transmission of band stability is high, can catch particulate, good endurance effectively.
To this solid-liquid seperator be described in further detail according to Fig. 2 now, but the present invention is not subjected to its any restriction.
That is to say that endless belt 10 is to make with filter cloth of the present invention.Be with in 10 at this, its material can only be made with filter cloth of the present invention, but can place a kind of material of enhancing so that increase its intensity along the side of this band in addition, and can apply the low material of water penetration so as anti-sealing from the side seepage, perhaps can affix one porose band and by the band of machine limit upper sprocket wheel guiding so that increase size stability.
This is with 10 to be assembled to many running rollers (13a 13b) go up and transmit with the direction of arrow, and the water 11 of filtered supplies to the water tank 12 of filtered water, and it is above this band sloping portion.The water tank of filtered water is surrounded by a framework 12a, can adorn the water of filtered.Conveyer belt 10 constitutes the end of the water tank of filtered water.By with 10 water being water after filtration, but at this moment preferably use a kind of machinery for example reduce pressure air exhauster 18 be used for sucking from the rear surface of band the water of filtered of confession, with the transfer roller 13 that mirror finish is arranged and pressure roller 13a to going up filter cake pressurization and the dehydration that forms.Filter cake 14 is sent on the surface of transfer roller 13 of mirror finish and by scraper 19 and scrapes and collect.In this case, this side of filter course is just in time faced the surface of the transfer roller that mirror finish is arranged.In addition, the fiber of filter course preferably is in the opposite direction of band direction of transfer, just backward.
The belt solid-liquid seperator of this structure has good cleaning restorability and filter cloth Treatment Stability, and the i.e. characteristic of two opposition of such characteristics is arranged, and the capture performance and the manageable amount of suspended solid are all pretty good.
In addition, used belt solid-liquid seperator has a kind of function, with checkout gear such as position infrared or laser sensor or touch sensor detection band, when sending a mechanism to, band output signal when the offset of transport process meta moves greatly makes the tram that brings back to it so that proofread and correct the bending of band, thereby obtain higher band and transmit stability, can be unattended in a very long time.In addition, used belt solid-liquid seperator has one to be used to detect the mechanism that degree falls in the pressure that sucks from the rear surface of band, with a mechanism that is used for by injection water begins to clean filter cloth or increase injection hydraulic pressure strengthens cleaning when pressure falls above predetermined value, reach one from beginning to clean or strengthen to clean filter cloth through after one section preset time, stop the cleaning of filter cloth or make it get back to the mechanism of normal operating state, concerning the filter cloth knot of accumulation gradually is dirty, might make its automatic recovery, thus might long-term stable operation.In addition, can save rinse water, make the operation of low operating cost become possibility.In this belt solid-liquid seperator, by installing this filter cloth, making filter course is in water one side of supplying with filtered, can obtain more performance.By said mechanism and filter cloth of the present invention combination, the superior function that obtains having no precedent for the first time.
Water to filtered, its suspended sediment concentration is relatively low as being less than hundreds of ppm, as Fig. 3 shows, filter cloth of the present invention is contained on rotary drum or the flat board, the water of filtered realizes that by filter cloth the filter of separation, this structure has superior particulate to capture performance and cleaning restorability, and there are good performance characteristic, its water penetration and particulate to capture the performance both in very high level.
To describe in further detail this solid-liquid seperator according to Fig. 3 now, but the present invention is not subjected to its any restriction.
Filter cloth 21 of the present invention be contained in drum-type disk-like structure parts around, rotate so that it is separated into inside and outside along the direction of arrow as rotary drum 28.Filter cloth is by many ribs supportings of for example stretching at width along the neighboring of rotary drum, and promptly filter cloth 21 is contained on its surface, and filtered water is by the gap between the rib.In situation shown in Figure 3, the water of filtered supplies to inside at interval then by filter cloth, but opposite another kind of method, and water is supplied with from the outside and also can be used to inside by filter cloth then.Particularly by adopting a kind of structure, wherein make the back of the body wash nozzle 26 and concentrated water pond 24a places with facing one another, the water of filtered and condensed water are not mixed like this, and its effect is good.As the mechanism of cleaning filter cloth, both can install the mechanism as the surface clean nozzle 27 that cleans from filtered water supply side, also can install the mechanism as the back of the body that cleans from the water transmission side that filters is washed nozzle 26, perhaps can both's installing.In this mechanism, the water that rouses interior filtered by the pressure official post of loss water-head 29 filters by filter cloth, thus the water that obtains filtering 23, but in needs, can pressurize so that improve the rate of filtration to water one side of filtered.Among Fig. 3, show the waterpipe 22 of filtered, condensed water 24 and surface clean nozzle 27 be the neighboring of the drum by filter cloth is housed all, but in fact these pipes all are that a center from this drum side enters into bulging inside.Filter with this structure, it does not need temporarily to stop filter process and goes the implementation back of the body to wash, so filter process can carry out continuously, according to this synergistic effect, this filter has the superior strainability that did not reach as yet to order, good particulate rejection rate, dimensional stability, the cleaning restorability of filter cloth of the present invention and very high water penetration.Higher performance is because filter cloth of the present invention has been installed, and filter course is obtained at the supply side of filtered water.In addition, by adopting a kind of structure, wherein drum or disk-like structure parts can rotate, and make and might repeatedly filter continuously, the recovery of the cleaning of filter cloth and suspended solid concentrate, thereby this is preferred.Use nozzle that filter cloth is sprayed-flow cleaning, can effectively clean with a spot of water.Adopting a kind of mechanism that the water of pressurization is flowed so that clean filter cloth along the rightabout with the mobile direction of filtered water, also is a kind of method for optimizing that is deposited in suspended solid on the filter cloth surface of removing.In addition, a kind of filter, it has a kind of by electrode bar, and optical pickocff or float or analog detect water surface site, perhaps pass through the mechanism that pressure gauge or pressure sensor or analog detect the degree of depth of water, thereby when the water of filtered passes through filter cloth, detect by resistance (pressure loss); Also have and a kind ofly be used for when surpassing a predetermined value, beginning cleaning or strengthen the mechanism of cleaning filter cloth and a kind ofly stop the cleaning of filter cloth or make it return to the mechanism of normal operating state through one period regular time after cleaning filter cloth from beginning to clean or strengthening by resistance, might increase the cleaning of filter cloth and increase treating capacity with such filter, and in the water of filtered suspended sediment concentration flip-flop and when uprising, perhaps increase and prevent during the very fast increase of knot dirt of filter cloth the overflow of filtered water suddenly when the flow velocity of filtered water.Also might realize long-term unmanned operation automatically.Also have, a kind of filter wherein supply side of filtered water is a kind of hermetically-sealed construction except unfiltered water is supplied with opening, thereby provide a kind of mechanism of the supply filtered water that is used for pressurizeing, can effectively utilize this mechanism and improve the water yield of processing, because it can make pressure be higher than the pass through resistance of filtered water by corresponding filter cloth to the pressurization of filtered water.Higher particulate rejection rate is arranged but during the lower filter cloth of coefficient of permeability, also can obtain the big processing water yield and can reach the thinner particulate of capture effectively in addition, even when using.
Example
These examples that show below make the present invention clearer, but the present invention is not limited thereto.Example 1 to 6, comparative example 1 to 4
Form warp and parallel and be made as a kind of fabric of bottom with 150 dawn, 48 monofilament lines (F1) of polyethylene terephthalate, make the filtering layer that a kind of two-layer fabric conduct of being made up of two fabrics up and down has fibre bundle with 240 dawn, 576 monofilament lines (F2) of polyethylene terephthalate.This fabric is the two-layer fabric that comprises the filter course fibre bundle, and fibre bundle repeats to stretch between the upper and lower fabric that separates with appointed interval back and forth.Some point of F2 fibre bundle and the mutual winding of the parallel of upper and lower fabric and in aggregates with both.The integral fabric of gained is cut into slices at the assigned address of thickness direction along the direction parallel with fabric face, obtain many fabrics that different length filter course fiber is arranged.Then, contact with the fine irregular surface that the brush of rotation rolls, make fibre bundle open, stretch out on the surface of filter course and on same direction, align simultaneously thereby fiber spreads over by fibre bundle side with these fabrics.Make fabric by between the level and smooth metallic roll and rubber rollers that heat then, thereby and make surperficial contact of fibre bundle side and metallic roll that fibre bundle is fixed on this state.At this moment, the gap between the roller can change according to the standard of fabric, makes the filter cloth of different filter course thickness in this way.To many filter clothes, they have different T/L than and the multiplier factor of the projected area of the filter course fibre bundle fiber of relative round floor assess their strainability.Assess with belt solid-liquid seperator shown in Figure 2, seperator has one by the water of filtered is drawn into the mechanism that the filter cloth with the endless belt operation filters from dorsal part, will be sent on the roller of mirror finish and collects at the filter cake that forms on the filter cloth.In when assessment, the residue mud of activated sludge process that contains the suspended solid 5320mg/liter (mg/litre) of average diameter 17.5 μ m (micron) is used as the water of filtered.Gained is the result be presented in the table 1.
As seen from the table, use filter cloth of the present invention, the rejection rate of suspended solid and initial water penetration coefficient are all very high in discharge water, and the time of the coefficient of permeability that reaches capacity is also very long.In comparative example 1, the value of T/L is little on the other hand, and two of rejection rate and water penetration coefficients are all low, time to limit water penetration coefficient is also short, and with the filter cloth of comparative example 2, wherein the T/L value is too high, water penetration coefficient height, also long to the time of limit coefficient of permeability, but rejection rate is low especially.With comparative example 3, because T/L and projected area ratio are all too high, and water penetration coefficient spy is low, and is also short especially to the time of limit water penetration coefficient.In comparative example 4, because T/L is too low, though rejection rate height and the water penetration coefficient is extremely low, the time of the water penetration that reaches capacity coefficient is also extremely short.Example 7 to 14, comparative example 5 to 7
Form warp and parallel and make a kind of fabric as bottom line (F3) with 250 dawn, 48 monofilament lines of polyethylene terephthalate as bottom, make a kind ofly, carry out many false twisted yarns that different crimp percents are arranged that line simulator is twined as the filter course that fibre bundle (F4) arranged with 300 dawn, 720 monofilament lines of polyethylene terephthalate by upper and lower two two-layer fabrics that fabric is formed.
This fabric is that two-layer fabric is included in and repeats the F4 that stretches between upper and lower two fabrics that separate with predetermined space back and forth.The parallel that this F4 fibre bundle has many points and upper and lower fabric is together entangled to each other and in aggregates with both.The whole two-layer fabric that obtains is cut along the assigned address of the direction parallel with fabric face at thickness direction, and the surface that obtains filter course is the free-ended fabric of fibre bundle.Then make these fabrics by between the brush roll and back flow roll that rotate, thereby the brushing fibre bundle opens it, make fiber stretch out on the filter course plane and on same direction, align simultaneously spreading all over.Then, open fibre bundle side is added the upper stress pressurization facing to the metallic roll surface of heating make the fibre bundle typing, so just make filter cloth.Strainability to the filter cloth made is by this way assessed.Assess with the rotary drum continuous filter, its filter cloth be contained on the rotary drum and filter course on the inboard and a mechanism water of filtered is incorporated into bulging inner filtration outside drum, as shown in Figure 3.In assessment, use the concentration of the suspended solid that contains the very little particulate of particle diameter to be approximately 11mg/liter (mg/litre), the lake water of average particulate diameter 7.8 μ m (micron) is as the water of filtered.The result who obtains is presented in the table 2.
Therefrom as seen use the filter cloth of example 7 to 14 of the present invention, the rejection rate height of the suspended solid in the water of filtered, water-head is lost also in lower level, has reached the balance of rejection rate and water penetration.On the other hand in comparative example 5 to 7, with fibre bundle with low fiber crimp ratio as filter course, some of them rejection rate height, water-head loss is also high, and that rate is made in the low and filter of other water-heads loss is also low, does not have a kind of balance that reaches rejection rate and water penetration.
Table 1
| Fibre bundle length L (1) (mm) | Filter course thickness T (2) (mm) | T/L | Projected area ratio (3) (doubly) | Rejection rate (4) (%) | Water penetration coefficient (5) (milliliter/square centimeter. second) | To time (6) of limit water penetration coefficient (hour) | |
| Example 1 example 2 examples 3 examples 4 examples 5 examples 6 | 2.5 3.0 8.5 10.5 19.0 19.5 | 0.3 1.5 1.4 7.0 2.9 11.3 | 0.12 0.50 0.16 0.67 0.15 0.58 | 10 45 34 246 278 343 | 90.1 91.5 93.4 98.6 99.7 99.4 | 11.4 10.3 8.5 9.3 7.5 7.1 | 1840 1920 1500 1600 1360 1220 |
| Comparative example 1 comparative example 2 comparative examples 3 comparative examples 4 | 1.5 1.5 10.8 25.0 | 0.23 1.2 8.1 0.4 | 0.015 0.8 0.75 0.016 | 3 5 410 34 | 75.4 55.8 98.5 99.7 | 3.9 9.8 3.1 1.6 | 400 1520 480 40 |
Table 2
| Fiber crimp than (7) (%) | Fibre bundle length L (1) (mm) | Filter course thickness T (2) (mm) | T/L | Stop rate (4) (%) | Loss water-head (8) (centimetre) | |
| Example 7 examples 8 examples 9 examples 10 examples 11 examples 12 examples 13 examples 14 | 5.5 11.3 16.2 16.5 25.6 55.7 89.4 94.6 | 2.4 24. 5.5 18.2 8.0 5.1 5.3 5.2 | 0.3 1.1 0.8 6.4 1.6 1.4 1.0 1.2 | 0.13 0.46 0.15 0.35 0.20 0.27 0.19 0.23 | 71 74 91 87 93 90 81 72 | 13.3 10.4 14.3 15.8 15.2 14.0 12.8 12.1 |
| Comparative example 5 comparative examples 6 comparative examples | 0.0 1.3 0.0 | 2.5 2.5 5.5 | 0.04 1.9 0.09 | 0.015 0.76 0.016 | 58 39 72 | 23.7 10.5 25.1 |
The definition of each parameter
(1) fibre bundle length
Free end from the upper end face of bottom (when bottom is a kind of woven fabric and its surface when bulge is arranged, the upper end of each bulge) to the filter course fibre bundle, the length mean value of each component fibre.When fibre bundle constituted ring, it was defined as the average length of each fiber of fibre bundle on the bottom upper end face.
(2) filter course thickness
Get the test piece of 3 centimetres of 9 approximate 3 cm x, on 3 pressurized operation platforms that are put into the pressure resiliometer that overlap.With a 2cm
2Probe be put in the test piece, loading is 6g (gram), measures its thickness after 10 seconds.Get the mean value measured for three times again divided by 3 thickness T of trying to achieve monolithic
1Then, remove the fibre bundle of filter course from filter cloth and make bottom, with measuring T
1Same procedure try to achieve the thickness T of monolithic
2The thickness T of filter course equation T=T
1-T
2Mm (millimeter) calculates.
(3) projected area ratio
Shown in following equation, projected area ratio can be defined as such value, with the filter course fibre diameter (as the fiber of cross-sectional deformation, the diameter of its main shaft) number (N) of each fiber of fibre bundle in the length (L) described in (1) above mean value (D) multiply by and the filter course of unit are filter cloth, the value that the gained product is tried to achieve divided by unit are (S) again.
Projected area ratio=D * L * N ÷ S
(4) rejection rate
Suspended sediment concentration in the water after filtered water and the filtration is respectively C
1And C
2The time, with equation
Try to achieve rejection rate R, suspended sediment concentration is measured according to standard JISK0102.
(5) water penetration coefficient
Use the equipment shown in Fig. 1.Fresh sample before measuring, in distilled water, soak earlier 24 hours wetting.Filter cloth is placed on down on the wire screen at screen pipe top, is fixed to screen pipe with anchor clamps.Distilled water is injected into screen pipe, and to keep the water-head height be 500mm, open cock, collect the water of 1 to 1.5 liter of filtration.Measuring Time in the cock standard-sized sheet, the water penetration coefficient calculates with following equation:
K=W ÷ (9.6 * S) (ml/cm
2.sec) (milliliter/square centimeter. second)
W is the water (ml) of the filtration of collecting in the formula, and S is time (sec) of cock standard-sized sheet and 9.6 are filter area (cm of filter cloth
2).The initial water penetration coefficient that shows in the table 1 is in the water of the filtered coefficient of permeability value by the fresh sample tested before them.
(6) select 1ml/cm
2.sec water penetration coefficient is as limit water penetration coefficient.The water of filtered filtered make the water penetration function progressively reduce, the water penetration coefficient of filter cloth is reduced to this limit water penetration coefficient very soon; Reach this limit water penetration coefficient from beginning up to the water penetration coefficient, it is long more to carry out filter time (to time of limit water penetration coefficient), and then this filter cloth is just good more.
(7) fiber crimp ratio
Measure by follow procedure:
A. each fiber of fibre bundle with filter course cuts away, and is distributed in the mode that each fiber does not tangle mutually in 20 ℃ the water.
B. fiber dispersion liquid is therein dripped on the sliding glass, push down with a cover-plate glass fiber is clipped in the middle, and they are distributed in the plane.
C. with microscope from directly over it is taken pictures, amplify 30 to 150 times, therefore the work of describing among the D below just is easy to carry out and changes according to the fiber number of fiber.
D. an illustraton of model that shows microphotograph among Fig. 4.The diameter of fiber is defined as R, a bit is defined as the b point from the central point a of fiber one end to corresponding 200 times of R air line distances on the fibrillar center line.Between a point and b point, connect with straight line.When the center line of straight line ab and fiber at certain a bit, but be not a point and b point, intersection or tangent, this fiber is counted curling fiber so.When straight line ab and fiber do not intersect in any point except that a point and b point or tangent, this fiber can not be counted crimped fibre so.The other end central point C of same fiber is carried out identical method, the air line distance of on the fibrillar center line, ordering apart from C be 200 times of R places a bit be defined as d.When straight line cd and fibrillar center line be not c point and d order certain a bit intersect and tangent, this fiber is also counted curling fiber so.When straight line cd and fiber do not intersect in any point except that c point and d point and tangent, fiber can not be counted curling fiber so.When being straight fully in the air line distance scope of fiber at 200 times of R, the center line of straight line ab or straight line cd and fiber overlaps each other, and tangent in all points, but this fiber can not be counted crimped fibre in this case.Have only the fibrillar center line of working as in a single day to leave straight line ab or straight line cd, intersect with it again then or tangent situation, this fiber is counted curling fiber.
E. 100 fibers are measured according to the method for describing among the top D, and are calculated the fiber crimp ratio by following equation:
Fiber crimp ratio=crimped fibre is counted ÷ 200 * 100 (%)
(8) water-head loss
The difference of the horizontal plane of the horizontal plane of filtered water and filtered water is lost as water-head in rotary drum.
(9) crimp percent
This is to measure with following program:
A. under the condition of standard, girth is 40 centimetres a spool, and the line that will measure with the spool coil winding machine twines 10 circles on spool.
B. hang over line on the suspension hook and put in the transparent vessel of 20 ℃ of water.
C. the line to each 20 folding adds the per dawn 0.002gf of initial load (gram force), measures the length L of dual slope after two minutes in water
0
D. follow, except initial load, line is added firm demand 0.1gf, measure the length L of dual slope after two minutes
1
E. calculate crimp percent with following equation:
Crimp percent=(L
1-L
0) ÷ L
1* 100 (%)
The applicability of industry
With this invention, by adopting the structure of above-mentioned this class, might obtain good particulate and capture performance and clean restorability, the filter cloth of very high durability and good dimensional stability is arranged. In addition, according to another kind of structure of the present invention, might obtain good particulate and capture performance, the resistive connection dirt, durability, and the new filter cloth of good water penetration is arranged, it can be preferably used for the solid of separate out suspended. Especially, even particle diameter is less than the particulate of 20 to 30 μ m (micron), with conventional filter cloth intractable, also can filter with filter cloth of the present invention, even also can solve satisfactorily to the subparticle less than several microns from sub-micron. The type of particulate is not limited to a certain form, but because the present invention is particularly suitable for release surface and is irregular particulate such as planktonic organism, in types of applications, can preferably use the present invention, for example from overhead water tank and cooling tower, remove microorganism, to water for industrial use with drinking water purifies or preliminary treatment, in sewage disposal, separate the aggegation material and reservoir, lake and planktonic organism marshy separate.
Claims (37)
1. filter cloth, it is characterized in that, comprise an at least one bottom and a filter course, wherein the thickness of filter course (T) is 0.02 to 0.7 to the ratio T/L of the fibre length (L) of the fibre bundle of formation filter course, and the projected area summation of fiber on bottom surface is 8 to 350 times that bottom surface is amassed.
2. according to the described filter cloth of claim 1, it is characterized in that, comprise an at least one bottom and a filter course, filter course mainly is made of than the fibre bundle greater than 5% fiber crimp.
3. according to the described filter cloth of claim 1, it is characterized in that the thickness of filter course (T) is 0.02 to 0.7 to the ratio T/L of the fibre length of the fibre bundle of formation filter course.
4. according to the described filter cloth of claim 1, it is characterized in that the projected area summation of fiber on bottom surface that constitutes the fibre bundle of filter course is 8 to 350 times that bottom surface is amassed.
5. according to the described filter cloth of claim 1, it is characterized in that, is 10% or littler at the percentage elongation of length direction and width.
6. according to the described filter cloth of claim 1, it is characterized in that an end of fibre bundle and/or middle part and bottom are in aggregates.
7. according to the described filter cloth of claim 1, it is characterized in that at least one end of fibre bundle is a free end.
8. according to the described filter cloth of claim 1, it is characterized in that the fiber of fibre bundle is freely and bends towards a specific direction.
9. according to the described filter cloth of claim 1, it is characterized in that the apparent density of filter cloth is 0.15 to 0.6gf/cm
3(gram force/cubic centimetre).
10. according to the described filter cloth of claim 1, it is characterized in that the fibre bundle density at the bottom surface place is 40 to 900 pieces/square centimeter.
11., it is characterized in that the length of filter course fiber is that 2mm is to 20mm (millimeter) according to the described filter cloth of claim 1.
12., it is characterized in that the structure of bottom is a woven fabric according to the described filter cloth of claim 1.
13., it is characterized in that the fibre bundle that constitutes filter course is intertwined in three places at least at the parallel and/or the warp of its root and bottom according to the described filter cloth of claim 1.
14., it is characterized in that the projected area summation of fiber on bottom surface is 10 to 250 times that bottom surface is amassed according to the described filter cloth of claim 1.
15., it is characterized in that according to the described filter cloth of claim 1, comprise an at least one bottom and a filter course, filter course mainly contains fiber crimp and constitutes than the fibre bundle greater than 10%.
16. a belt solid-liquid seperator is characterized in that the suspended solid in the water of filtered is to be separated by conveyer belt, conveyer belt uses according to the described filter cloth of claim 1.
17. belt solid-liquid seperator, it is characterized in that, comprise following at least a mechanism: one centers on the band that wherein many rollers installings comprise the described filter cloth of claim 1, and make band center on the mechanism of their motions, one water with filtered supply to inclination with on mechanism, the mechanism of the water of one filtered of suck supplying with from the rear surface of band, a pair of filter cake pressurization makes with the mechanism of going up the cake dewatering that forms, and a mechanism and that scrapes the filter cake of dehydration is used for cleaning the mechanism of this band.
18. comprise a mechanism that is used to detect the position of band side and proofreaies and correct the bending of band according to claim 16 or 17 described belt solid-liquid seperators.
19. according to the described belt solid-liquid of claim 17 seperator, it is characterized in that, comprise that one is used to detect the mechanism of falling because of the pressure that causes from the rear surface suction of being with, one is used for surpassing the mechanism that begins or strengthen the cleaning of filter cloth when setting value when pressure falls, with one be used for beginning to clean or strengthening cleaning through after one period regular time from filter cloth, stop the cleaning of filter cloth or return to the mechanism of normal operating state.
20. a solid-liquid seperator is characterized in that, around rotary drum or dull and stereotyped the installing according to the described filter cloth of claim 1, carries out the separation of suspended solid in filtered water.
21. filter, it is characterized in that, comprise following at least a mechanism, one by being separated into inside and outside mechanism according to the described filter cloth of claim 1 with it around drum or the installing of disk-like structure parts, one water with filtered supplies to the outside of separation or inner and make the mechanism of the water of filtered by this filter cloth, and the mechanism and that an opposite side from the supply side of filtered water and/or filter cloth cleans filter cloth is used to discharge the mechanism by cleaning the condensed water that produces.
22., it is characterized in that drum or disk-like structure parts are rotating according to the described filter of claim 21.
23., it is characterized in that cleaning is to use jet cleaning according to claim 20 or 21 described filters.
24., it is characterized in that the liquid that makes pressurization flows along the rightabout that flows with the water of filtered and carries out the cleaning of filter cloth according to the described filter of claim 21.
25. according to claim 20 or 21 described filters, it is characterized in that, the water supply side of filtered seal except filtered water is supplied with opening, installs the mechanism that can pressurize to the water of filtered there, makes its pressure greater than the pass through resistance of filter cloth to the water of filtered.
26. according to the described filter of claim 21, it is characterized in that, comprise that one is used to detect the mechanism that pass through resistance of the water of filtered to filter cloth, one is used for when surpass the mechanism that begins or strengthen the cleaning of filter cloth when setting value by resistance, with one be used for filter cloth begin or strengthen clean through one period regular time after, stop the cleaning of filter cloth or return to the mechanism of normal operating state.
27. according to the described filter of claim 25, it is characterized in that, except the water of filtered is supplied with opening, install the condensed water exhaust openings at the water supply side of filtered.
28. according to the described filter of claim 21, it is characterized in that, comprise that one is used to detect the mechanism that pass through resistance of the water of filtered to filter cloth, one is used for the mechanism that begins or strengthens the cleaning of filter cloth when surpassing last setting value by resistance, and one is used for being lower than the mechanism that stops the cleaning of filter cloth when descending to set value or return to normal operating state when dropping to by resistance.
29. according to the described belt solid-liquid of claim 17 seperator, it is characterized in that, comprise following at least a mechanism, one centers on the band that wherein many rollers installings comprise filter cloth, and make band center on the mechanism of their motions, one is used for detecting the position of this band side and the mechanism of the bending that correction is with, and the water with filtered supplies to the mechanism of the band of inclination, and one is used for sucking from the rear surface of this band the mechanism of the water of the filtered of supplying with.
30. according to the described belt solid-liquid of claim 29 seperator, it is characterized in that, comprise that one is used to detect because the mechanism that the pressure that causes from the rear surface suction of being with falls, one is used for beginning when surpassing setting value or the mechanism of the cleaning of reinforcing band when pressure falls, with one be used for beginning to clean or strengthening cleaning through after one period regular time from band, stop with cleaning or return to the mechanism of normal operating state.
31. according to the described belt solid-liquid of claim 29 seperator, it is characterized in that, comprise that one is used to detect the mechanism of falling because of the pressure that causes from the rear surface suction of being with, one is used for beginning when surpassing last setting value or the mechanism of the cleaning of reinforcing band when pressure falls, with one be used for falling and drop to when being lower than down setting value when pressure, stop with cleaning or return to the mechanism of normal mode of operation.
32., it is characterized in that cleaning is with this band of jet cleaning from filtered water supply side according to the described belt solid-liquid of claim 29 seperator.
33. according to the described filter of claim 21, it is characterized in that, comprise following at least a mechanism, one by being divided into inside and outside mechanism around drum or disk-like structure parts installing filter cloth, the water of one supply filtered is to the outside or inside of separating and make the mechanism of the water of filtered by filter cloth, one per-meate side that is used for never filtered water supply side and/or filter cloth is cleaned the mechanism of filter cloth, one is used to detect the mechanism that pass through resistance of the water of filtered to filter cloth, one is used for when surpass the mechanism that begins or strengthen the cleaning of filter cloth when setting value by resistance, one is used for beginning cleaning or strengthen to clean through after one period regular time from filter cloth, the mechanism and one that stops the cleaning of filter cloth or return to normal operating state is used to discharge the mechanism of cleaning the condensed water that produces.
34. according to the described filter of claim 21, it is characterized in that, comprise following at least a mechanism, one by being divided into inside and outside mechanism around drum or disk-like structure parts installing filter cloth, one supply filtered water is to the outside or inside of separating and make the mechanism of the water of filtered by filter cloth, one is used for from the mechanism of the per-meate side clear water filter cloth of filtered water supply side and/or filter cloth, one is used to detect the mechanism that pass through resistance of the water of filtered to filter cloth, one is used for the mechanism that begins or strengthen the cleaning of filter cloth when surpassing last setting value by resistance, one is used for when dropping to by resistance when being lower than down setting value, the mechanism and one that stops the cleaning of filter cloth or return to normal operating state is used to discharge the mechanism of cleaning the condensed water that produces.
35., it is characterized in that the enhancing of cleaning is the pressure that increases jet cleaning according to claim 30 or 34 described belt solid-liquid seperators.
36. according to claim 30 or 34 described belt solid-liquid seperators, it is characterized in that, the cleaning of normal condition be water supply side from the filtered of band with jet cleaning this band, and the cleaning of enhancing is with this band of jet cleaning from the per-meate side be with.
37., it is characterized in that the cleaning of normal condition is from per-meate side jet cleaning filter cloth according to claim 30 or 34 described filters, and the cleaning that strengthens is the water supply side jet cleaning filter cloth from the filtered of filter cloth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96197202A CN1079685C (en) | 1996-05-31 | 1996-05-31 | Filter cloth and filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96197202A CN1079685C (en) | 1996-05-31 | 1996-05-31 | Filter cloth and filter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1197407A CN1197407A (en) | 1998-10-28 |
| CN1079685C true CN1079685C (en) | 2002-02-27 |
Family
ID=5129158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96197202A Expired - Fee Related CN1079685C (en) | 1996-05-31 | 1996-05-31 | Filter cloth and filter |
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|---|---|
| CN (1) | CN1079685C (en) |
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|---|---|---|---|---|
| CN101810970B (en) * | 2009-11-27 | 2014-01-01 | 新乡市金利达化纤厂 | Filter cloth for band filter |
| KR101568072B1 (en) * | 2011-04-05 | 2015-11-10 | 니혼 스핀들 세이조 가부시키가이샤 | Dust collection filter, dust collection apparatus provided with same, and manufacturing method for dust collection filter |
| CN102580390B (en) * | 2012-03-15 | 2013-09-18 | 李强 | Horizontal filter plate type dehydrator |
| CN103585821B (en) * | 2013-11-07 | 2015-08-19 | 天津大学 | The cleaning method of copper concentrate pressure filtration multifilament filter cloth used |
| CN103638732B (en) * | 2013-12-16 | 2015-03-11 | 丹东东方机电工程有限公司 | Band type drum filter |
| CN107350268B (en) * | 2017-08-04 | 2023-04-07 | 骧腾科技(深圳)有限公司 | Transmission type solid-liquid separation mechanism |
| CN108721988B (en) * | 2018-06-05 | 2020-09-29 | 河南融基新能源有限公司 | Water treatment device capable of filtering and cleaning impurities on filter plate |
| WO2022000231A1 (en) * | 2020-06-30 | 2022-01-06 | Metso Outotec Finland Oy | Pressure filter |
| CN113713475A (en) * | 2021-08-04 | 2021-11-30 | 安徽普氏生态环境工程有限公司 | Internal and external washing type micro-filter |
| CN113893607B (en) * | 2021-09-30 | 2022-09-06 | 内蒙古大中矿业股份有限公司 | Tailing overflow clarifying device used in iron ore filling |
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-
1996
- 1996-05-31 CN CN96197202A patent/CN1079685C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS522017U (en) * | 1975-06-24 | 1977-01-08 | ||
| JPH0118768B2 (en) * | 1984-07-26 | 1989-04-07 | Toray Industries |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1197407A (en) | 1998-10-28 |
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