Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/39—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type
  • B01D29/41—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
  • B01D29/111—Making filtering elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
  • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
  • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
  • B01D29/31—Self-supporting filtering elements
  • B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D39/00—Filtering material for liquid or gaseous fluids
  • B01D39/02—Loose filtering material, e.g. loose fibres
  • B01D39/04—Organic material, e.g. cellulose, cotton
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D39/00—Filtering material for liquid or gaseous fluids
  • B01D39/14—Other self-supporting filtering material ; Other filtering material
  • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
  • B01D39/1607—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous
  • B01D39/1623—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being fibrous of synthetic origin
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D39/00—Filtering material for liquid or gaseous fluids
  • B01D39/14—Other self-supporting filtering material ; Other filtering material
  • B01D39/16—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres
  • B01D39/18—Other self-supporting filtering material ; Other filtering material of organic material, e.g. synthetic fibres the material being cellulose or derivatives thereof
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D39/00—Filtering material for liquid or gaseous fluids
  • B01D39/14—Other self-supporting filtering material ; Other filtering material
  • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
  • B01D39/2055—Carbonaceous material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/18—Filters characterised by the openings or pores
  • B01D2201/182—Filters characterised by the openings or pores for depth filtration
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2201/00—Details relating to filtering apparatus
  • B01D2201/29—Filter cartridge constructions
  • B01D2201/291—End caps
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
  • B01D2239/04—Additives and treatments of the filtering material
  • B01D2239/0407—Additives and treatments of the filtering material comprising particulate additives, e.g. adsorbents
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
  • B01D2239/06—Filter cloth, e.g. knitted, woven non-woven; self-supported material
  • B01D2239/0604—Arrangement of the fibres in the filtering material
  • B01D2239/064—The fibres being mixed
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
  • B01D2239/08—Special characteristics of binders
  • B01D2239/086—Binders between particles or fibres

Definitions

• Filter device together with a filter element that can be accommodated therein and methods for operating such a filter element together with the device
• the invention relates to a filter device with a filter housing which has an inlet for non-filtrate and an outlet for filtrate and which accommodates an exchangeable, hollow-cylindrical filter element for non-filtrate to flow through from the outside to the inside.
• Such a filter element designed as a replacement element is shown in WO 2018/082799 A1, the element material of which is designed as a hollow body and extends between two end caps and is pleated with individual filter folds, the element material having a filter material made of cellulose.
• the cellulose fibers When the fluid flows through, the cellulose fibers have a coalescing effect, which means that larger droplets are formed from the water content of the emulsion, which sink down due to the difference in density between water and oil, so that the less dense medium is separated.
• Such a filter element performs the mentioned water separation in a functionally reliable manner and is also inexpensive to manufacture.
• the well-known filter element can be fixed by means of a receiving rod as part of a fixing device in a device with a filter housing, with each end cap of the filter element having a spacer with a sealing function, once on the fixing device and once on an intermediate floor of the filter housing. In this way, no additional holding means protruding beyond the outer circumference of the filter element are necessary, which enables a space-saving design.
• EP 3 334 512 B1 discloses an oil filtration unit for removing solid contaminants from contaminated oil, comprising:
• a housing comprising a housing inlet suitable for receiving contaminated oil from the environment and releasing the contaminated oil to an internal opening of the housing at a first pressure p1 and a housing outlet suitable for releasing filtered oil to the environment , and
• An oil filter for filtering the contaminated oil the oil filter being arranged in the inner opening of the housing and comprising a filter inlet defined by an outer surface of the oil filter, an inner filter volume suitable for filtering oil at a second pressure p2, the second pressure p2 being lower than the first pressure p1, and a filter outlet within the housing providing fluid/liquid communication between the inner filter volume and the housing outlet to drain the filtered oil from the inner filter volume ,
• an end plate of the oil filter comprises the filter outlet, where the entire end plate comprises a porous material through which oil can flow, so that at least part of the end plate forms part of the filter outlet, - and wherein the filter outlet comprises a hydraulic resistance forming part of the oil filter, said hydraulic resistance providing a fluid/liquid flow restriction between the inner filter volume and the housing outlet to increase the second pressure p2 within the inner filter volume and to discharge the filtered oil from the inner filter volume into the housing outlet at a third pressure p3, the third pressure p3 being lower than the second pressure p2.
• the associated oil filter or the filter element is designed as a hollow cylinder and consists of cellulose material.
• a disk-shaped endplate of the oil filter comprises the filter outlet of the filter housing, which endplate thereto may comprise a porous material of natural or synthetic polymer and cellulosic material.
• the well-known filter element as an oil filter is flowed through from the inside to the outside, whereby a hydraulic resistance is formed by the mentioned end plate made of porous material, which in this respect provides a flow limit between the inner filter volume and the environment, in order to achieve the already mentioned pressure gradation p1 > to achieve p2 > p3.
• the purpose of this pressure gradation is that in this way a pressure build-up (back pressure) for the filter element is to be avoided, which occurs, for example, when a hydraulic pump device or the like is connected to the output side of the filter.
• the element material is provided with a sealing device on the bottom side of the filter element opposite the receiving filter housing, which on the one hand limits the effective filter surface on the filter element and on the other hand requires a certain amount of technical equipment on the filter housing entails.
• the invention is based on the task of maintaining the advantages of the known solutions, namely ensuring a functionally reliable filtration operation by further improving it so that the efficiency during the filtration is improved, with a technically simple structure and in cost-effective way.
• a corresponding task is solved by a filter device with the features of patent claim 1 in its entirety and a filter element according to the features of independent patent claim 2 together with a method for operating such a filter element with the features of independent patent claim 12.
• the filter device according to the invention provides that when unfiltrate flows through the replaceable filter element from the outside inwards, both a hollow cylindrical element material and an element material closing the hollow cylinder at its one free end flow through, at the other free end of which there is an element cap a central recess is used to release filtrate to the outlet in the filter housing, which is connected to the central recess, and that the respective element material is accommodated in the filter housing without a seal for all-round flow from the outside to the inside, there is only a simple pressure stage at which the pressure p1 outside the filter element is greater than the delivery pressure p2 on the inside of the hollow-cylindrical element material which is closed on one side.
• the element material of the filter element is flown through as a whole from the outside to the inside and accordingly no additional sealing device of the filter housing acts on the bottom side of the element material, the full filter surface is available for filtration and the expenditure on apparatus is reduced due to the omission of such a sealing device.
• the filter element according to the invention for the filter device consists of cellulose material, both in terms of the hollow-cylindrical element material and the element material that closes the hollow cylinder, which is particularly advantageous due to the homogeneous formation of the element material when small-particle contaminants have to be separated from a fluid flow, what This is the case, for example, if you want to separate so-called oil aging products (varnish) from a fluid flow.
• the erfindungsge Permitted method ensures a pertinent filtration operation with the above-described device together with filter element and due to the only single existing pressure level p1 in direction p2 fluid resistances are reduced and a high filtration performance is achieved when applying the method according to the invention.
• the hollow cylinder of the filter element is formed from individual, preferably identical, ring-shaped filter disks which are arranged one above the other at their adjacent end faces and are firmly connected to one another, preferably glued together and that the element material closing off the hollow cylinder at one end is formed from a closed filter disc.
• the filter element in the sense of a modular system, can be built up in any length through which the same ring-shaped filter discs flow in a superimposed arrangement.
• the ring-shaped filter disks mentioned can be manufactured as identical components in large numbers in the manner of series production, which is cost-effective.
• all filter discs made of cellulose material have the same filter properties, in particular the same filter fineness, and that the ring-shaped filter discs all have the same structure in terms of their element material.
• the cellulose filter discs mentioned are manufactured based on DIN EN ISO 5269-2 using the so-called Rapid-Köthen process and, as a standardized process in this respect, a high level of process reliability is achieved during production.
• the individual ring-shaped filter discs have recesses on the outer circumference, which are formed by incisions or by adjacent spacers between the filter discs.
• the recesses obtained increase the stability of the leaf assembly with the individual filter discs and allow flow guidance for the unfiltrate stream, which flows through the filter element with the filter discs from the outside to the inside.
• the disk-shaped element material that closes the end of the hollow cylinder can be provided with an additional geometry, preferably in the form of an introduction device that engages in the interior of the hollow cylinder.
• the inlet device can preferably from the outer periphery, a Have trumpet shape whose largest cross-section merges integrally into the ele ment material of the closed filter disc. Since the inlet device on the bottom side of the element material also represents a certain resistance for the flow through the filter element, there is improved flow in the head area of the element and thus an overall more even flow distribution in the filtration operation.
• the hollow-cylindrical element material is accommodated between two end caps, of which one end cap is designed as a double receptacle and at the same time serves to fix the closed disc-shaped element material at the end of the ring-shaped element material.
• the hollow-cylindrical element material can be separated from the disk-shaped element material by means of the double recording and exchanged for a new element material.
• the disk-shaped element material is firmly glued or welded at the end to the hollow-cylindrical element material, so that the disk merges into the hollow cylinder without a gap. In this way, a uniform inflow is also achieved in the connection area of disk-shaped element material with hollow-cylindrical element material, and the filter element constructed in this way can be exchanged as a whole for an individual new element.
• the two end caps each have a central recess whose diameter is the same, the diameter of the end cap with which the filter element can be connected to an outlet of the filter housing having a diameter that corresponds to the inner diameter of the hollow cylinder of the Filter element corresponds.
• the latter feature enables the filtrate to be discharged without resistance in the direction of the outlet of the filter device.
• closed disc-shaped element material is to be formed from a filter disc that is from the sheet former, in particular from a Rapid-Köthen sheet forming system available on the market.
• the system is used to remove contaminants, preferably varnish, from a fluid flow, with the filter element being accommodated in a filter housing with an inlet for unfiltrate and with a Outlet for filtrate, according to the invention when unfiltrate flows through the filter element from the outside in, both a hollow cylindrical element material and an element material closing the hollow cylinder at one free end are flown through, with the filtrate flow being guided from the inside of the hollow cylinder to the outlet of the filter housing and wherein the respective element material is accommodated without a seal in the associated filter housing for all-round flow from the outside to the inside.
• Varnish is not regularly listed in the literature as a "hard" particle and therefore does not represent actual particulate contamination; rather, it is regularly a question of sludge-like oil aging products.
• the cellulose used for the filter element can be constructed in the manner of a composite material.
• the cellulose can be combined with fillers, additives, filter aids, etc.
• Silicates such as kaolin, carbonates, such as chalk, are regularly used as fillers; sulfates such as gypsum, barium sulfate; oxides such as titanium dioxide; Aramid fibers and/or carbon fibers are used.
• Suitable additives are sizing agents, binder systems, dry and wet strength agents, pigments, dyes, drainage and retention aids and defoamers.
• Diatomaceous earth, silica gel, perlite, zeolites or activated carbon can be used as filter aids.
• FIG. 1 in the form of a longitudinal section, the filter device as a whole, consisting of a filter housing and an incorporated filter element;
• FIG. 2 shows the filter element used with arrows relating to the flow behavior of the filter element
• Figure 3 is a more detailed representation in the manner of a longitudinal section through a second embodiment of a filter element
• FIG. 4 shows a side view from the outside of a filter element comparable to FIG. 3;
• FIG. 5 shows a perspective view of a third embodiment of a filter element.
• FIG. 1 shows the filter device according to the invention as a whole in the form of a longitudinal sectional illustration in a greatly simplified form.
• the Filtervor device has a filter housing 10, which has an inlet 12 for unfiltrate and an outlet 14 for filtrate.
• a replaceable filter element 16 In the filter housing 10 is a replaceable filter element 16, during which unfiltered material flows from the outside inwards, as shown in FIG.
• an element cap 26 At the other free end 24 of the filter element 16 or of the hollow-cylindrical element material 18 there is an element cap 26 with a central recess 28 which serves to remove filtrate and is connected to the outlet 14 of the filter housing 10 .
• a corresponding central recess 29 is formed by the free end of the hollow cylinder 18 ( Figure 2).
• a head-side housing part To replace the filter element 16, a head-side housing part must be separated from a bottom-side or pot-side housing part with the filter element 16, which is usual, so that it will not be discussed in more detail at this point.
• the upper element cap 26 is pushed over a socket as part of the outlet 14 and in this area a sealing ring 30 on the housing side as the sole seal between element 16 and Ge housing 10 is sealed. Otherwise, the respective element material 18, 22 is accommodated in the filter housing 10 without a seal as shown in FIG. In particular, there is no seal in the bottom area of the filter housing 10 opposite the closing element material 22 .
• the closing element material 22 is accommodated in a foot or bottom end cap 32, which is designed as a kind of double receptacle and at the same time serves to fix the element material 22, which is formed in the form of a closed disk, as also the determination of the hollow-cylindrical element material 18.
• the inclusion of corresponding element ment material of a filter element 16 in the element-closing end caps is known, so that it will not be discussed in more detail at this point.
• the element material 18, 22 of the filter element 16 is preferably made entirely of cellulose material, i.e. both the hollow-cylindrical element material 18 and the closed element material 22.
• the term "closed" in the sense of the notification solution means that the element material 22 is porous throughout, but otherwise has no fluid passages, such as fluid-carrying throttle passages, which could connect the environment with the hollow-cylindrical interior 34 of the hollow cylinder 18.
• the unfiltrate is exclusively via the porosity of the element material 22 for a passage into the interior space 34 of the element 16 introduced.
• the hollow cylinder 18 of the filter element 16 consists of individual, preferably identical, ring-shaped filter discs 36, which are arranged one above the other or respectively in a stacked sequence and are firmly connected to one another, preferably glued, on their adjacent end faces.
• the filter disk 36 arranged at the bottom as the element material 22 closing the free end of the hollow cylinder 18 is not accommodated in an additional end cap 32, but rather in the stack sequence directly with the lowermost filter disc 36 of the hohlzylindri's element material 18 is firmly connected, in particular firmly glued or welded.
• the filter disc 38 arranged at the very top forms a receiving option for the upper element cap 26 with the center recess 28, the boundary edge of which has a groove-shaped depression 40 for receiving the sealing ring 30 as shown in FIG the figure 1 .
• the element cap 26 surrounds the outer peripheral side of the outer edge of the uppermost filter disk 38 and is firmly connected to it, for example by means of an adhesive compound.
• the individual filter discs 36 can also be formed from partial halves 36a, 36b which, viewed diametrically to the catch axis of the filter element 16, have identically formed recesses 42 opposite one another, which are formed by notched cuts or embossings in the filter discs 36 are formed or are configured by two filter disc halves 36a, 36b of a filter disc 36 angiogren collapsing. Furthermore, there are corresponding further recesses 44 in the stacking sequence between filter disks 36, which are formed accordingly to the recesses 42. The respective recess 42, 44 thus runs from a rectangular central region at the edge, tapering in the manner of a wedge, into the respective filter disk 36, or into the adjacently arranged disk halves 36, 36b.
• Ausneh rules 42, 44 in the form of incisions or indentations are only on the top of the respective element material 18, 22 and grei fen not in the hollow cylindrical interior 34 of the filter element 16 a.
• the possible directions of flow through the filter element 16 are again indicated by arrows in FIG.
• the recesses 42, 44 are formed by corresponding impressions or incisions on the circumference, with the recesses 42, 44 in any case stiffening the stability of the cellulose element as a whole and improving the flow guidance for the unfiltrate flow from the outside into the interior 34 of the filter element 16 are used.
• each filter disc there are 36 or between disc halves 36a, 36b of a filter disc 36 in each case four recesses 42, 44 lying in a common radial plane.
• the disc-shaped element material 22 which is closed except for its porosity, is formed from a filter disk that comes from the sheet former.
• the individual disk halves 36a, 36b, forming individual filter disks have radially extending delimiting rods facing each other as spacers 46, which delimit recesses 48 between them, which in turn serve to improve fluid guidance, but again do not completely penetrate the filtering material fen, comparable to the recesses 42, 44 according to the previously be described embodiments.
• the interior 34 can also have a flow guide or inlet device 50, which has a trumpet shape for improved flow guidance inside the filter element 16, the largest cross section of which is integrally integrated into the Element material of the closed lower filter disc 36 passes.
• the solution according to the invention is used in particular to remove so-called varnish from a fluid flow, regularly formed from oil aging products that are not listed in the literature as "hard particles" and therefore do not represent particulate contamination in the actual sense.
• the application also relates to drainage, In particular, cellulose has the property of being able to absorb water. In this way, oil-water separation can also be achieved. Finally, there is also the possibility of particulate filtration.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Filtering Materials (AREA)
• Filtration Of Liquid (AREA)
• Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
• Thermistors And Varistors (AREA)
• Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Separation Using Semi-Permeable Membranes (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=81654782

Family Applications (1)

Country Status (8)

Families Citing this family (1)

Citations (5)

Family Cites Families (3)

• 2021
  • 2021-05-20 DE DE102021002647.0A patent/DE102021002647A1/de active Pending
• 2022
  • 2022-04-27 CN CN202280031140.8A patent/CN117222462A/zh active Pending
  • 2022-04-27 EP EP22723694.0A patent/EP4288177B1/de active Active
  • 2022-04-27 JP JP2023564178A patent/JP2024518037A/ja active Pending
  • 2022-04-27 BR BR112023019845A patent/BR112023019845A2/pt unknown
  • 2022-04-27 AU AU2022277601A patent/AU2022277601A1/en active Pending
  • 2022-04-27 US US18/562,813 patent/US20240216838A1/en active Pending
  • 2022-04-27 WO PCT/EP2022/061180 patent/WO2022242994A1/de not_active Ceased
  • 2022-04-27 EP EP25172652.7A patent/EP4582162A3/de active Pending

Patent Citations (5)

Also Published As

Similar Documents

Legal Events