EP1073507A1 - Ringspaltinjektor - Google Patents
RingspaltinjektorInfo
- Publication number
- EP1073507A1 EP1073507A1 EP98931998A EP98931998A EP1073507A1 EP 1073507 A1 EP1073507 A1 EP 1073507A1 EP 98931998 A EP98931998 A EP 98931998A EP 98931998 A EP98931998 A EP 98931998A EP 1073507 A1 EP1073507 A1 EP 1073507A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- annular gap
- pressure
- ring
- channel
- annular
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 47
- 239000012528 membrane Substances 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000011010 flushing procedure Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 239000000428 dust Substances 0.000 abstract description 5
- 238000011144 upstream manufacturing Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 abstract 3
- 238000000746 purification Methods 0.000 abstract 3
- 239000002912 waste gas Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4272—Special valve constructions adapted to filters or filter elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
Definitions
- the invention relates to an annular gap injector, in particular for one and several injector stages, consisting of a flow tube, on the outer periphery of which a cleaning gas connection channel is arranged at the upper tube end, which opens radially inwards into an annular gap acting as a nozzle.
- a two-stage injector for exhaust gas cleaning of dust filters consisting of a housing which is separated by a partition into a raw gas chamber and a clean gas chamber. As many circular openings are provided in the partition as there are filter elements.
- the raw gas chamber of the housing is provided with a raw gas inlet for the raw gas laden with dust and with a dust discharge for removing the filtered dust.
- the clean gas chamber has a clean gas outlet for the clean gas. Filter elements are suspended in the circular openings.
- An inlet nozzle is provided for opening each filter element.
- Each inlet nozzle has a radius at its inlet, which points outward into the clean gas chamber.
- Annular gap injectors with connecting sleeves are attached to the compressed air supply line in the clean gas room.
- An annular channel is arranged on the annular gap injector and opens radially inwards into an annular gap which is referred to as the "Coanda" nozzle. This gap is smaller and for a radially inward to a cylindrical outlet tube of the annular gap injector.
- the disadvantage of this invention is the series-connected annular gap injectors, which can only be pressurized with compressed air and thus clean the filter elements at time intervals, regardless of the amount of particles adhering to them.
- This uncontrolled blowing off of the quantity of particles occasionally leads to material accumulations due to discontinuous discharge of the filter powder at the outlet of the cleaning device and possibly to blockage 2 of the material exit.
- the strong pressure of the cleaning air from the jointly connected annular gap injectors creates a disruptive recoil to the upstream process system.
- the object of the invention is to provide annular gap injectors that can be controlled without valve circuits on the inlet of the cleaning gas for cleaning filter elements, the annular gap injectors in a cleaning device depending on the adhering
- Particle quantity should be activated individually on the respectively assigned filter elements and thus achieve a quasi-continuous discharge of the particles from the cleaning device without a disruptive influence on the upstream process system.
- the object is solved by the features of claim 1.
- Advantageous embodiments of the invention are described in claims 2 to 10.
- the advantage of the invention is the connection of the cleaning gas by means of a valve which is operated only with low-volume control air. These valves are inexpensive and can therefore be used for any annular gap injector in a cleaning device. Since the switching intervals for the individual annular gap injectors depend on the full functionality of the filter elements (amount of adhering particles), the outflow of unnecessary cleaning gas is avoided. In addition, the dependence of the functionality of the filter elements on their placement in the
- Cleaning device are taken into account, since the filter elements in the vicinity of the inflow opening of the gas to be cleaned in the cleaning device are much more contaminated with particles.
- Annular gap injectors avoid annoying recoil to the upstream process plant.
- the solution is too 3 can be designed so that selected groups of annular gap injectors can be switched together.
- the invention is explained in more detail below using two exemplary embodiments.
- the associated drawings show:
- FIG. 1 A sectional view of an annular gap injector according to the first embodiment including the units in operative connection.
- FIG. 2 detailed view from FIG. 1
- Fig. 3 A sectional view of an annular gap injector according to the second embodiment including the units in operative connection.
- a plurality of annular gap injectors are arranged in a pressure body 8.
- the flow tube 2 is arranged with its upper region in the pressure body 8, as a result of which the pressure body 8 has a type of box profile with the above ring opening.
- the interior (box profile) of the pressure body 8 is operatively connected to a compressed air generator or container 11 via a valve 12.
- an inner channel ring 15 is arranged, which has radial curvatures on the inner edge to the inside of the flow tube 2.
- an outer ring 1 is fastened on the pressure body 8, on which an upper part ring 3 is arranged, the inner edge of which opens at the radial curvature of the channel inner ring 15, as a result of which the annular gap 13 is formed.
- a circular membrane 4 is arranged in the channel 14 to shut off the passage of the cleaning gas.
- the outer edge of the annular membrane 4 is clamped or welded between the outer ring 1 and the upper ring 3 and the inner edge of the annular membrane 4 is firmly connected to the upper ring 3, for example 4 welded.
- a sealing element 5 is arranged between outer ring 1 and upper part ring 3 for sealing.
- This annular membrane arrangement forms an annular channel 16 between the annular membrane 4 and the upper part ring 3, which is operatively connected to a compressed air generator 9 via a valve 10.
- the valve 10 is still in operative connection with a controller 7.
- the annular gap injectors are in a known manner in a gas cleaning device with, for example, two
- Injector stages installed and are used to clean filter elements 17 which are contaminated with particles in the gas cleaning process.
- the cleaning gas is switched on via the valve 12 into the interior of the pressure body 8 with a pressure of preferably approximately four bar.
- 16 compressed air is present in the ring channel with a control pressure of preferably six bar.
- the pressure difference presses the annular membrane 4 against the sealing element 6, as a result of which no cleaning gas flows out through the annular gap 13.
- the valve 10 is closed, the control command comes from the controller 7.
- the annular channel 16 is vented, there is no control pressure on the annular membrane 4, which opens the channel 14 and the cleaning gas via the annular gap 13 flows out for cleaning the particles on the filter element 17.
- the compressed air is switched on again in the annular channel 16, as a result of which the annular membrane 4 lies against the sealing element 6 and switches off the outflow of the cleaning gas.
- Switching intervals for cleaning the particles are switched based on experience. Since the filter elements 17 are contaminated with particles to different extents depending on the placement of the injector stages in the cleaning device (different placement relative to the gas inflow opening), this dependency is taken into account in the switching intervals. This only makes them strong with particles 5 contaminated filter elements 17 cleaned and the removed particles can be removed in a quasi-continuous process. By switching the ring gap injectors individually, there is no disruptive recoil in the upstream process system. It is also within the scope of the invention to provide the filter elements 17 with sensors for measuring the amount of adhering particles, to process these measurement results in the control system for commands for switching the compressed air in the ring channel 16 for cleaning the particles on the filter elements 17.
- the flow tube 2 is arranged with its upper region in a pressure body 8 and on the end of the flow tube 2 a lower part ring 20 provided with an annular channel 21, on which an upper part ring 3 is arranged.
- the inner edge of the upper part ring 3 opens at the radial curvature of the lower part ring 20, as a result of which the annular gap 13 is formed.
- a shut-off element is preferably arranged between the annular channel 21 and the interior of the pressure body 8 (cleaning gas supply). In the shut-off element, a valve bore 22 is introduced from the annular channel 21 toward the pressure body interior, which has a valve seat 23 on the pressure body side within the valve bore 22 .
- the guide piece 25 has only lateral cantilevers from the actual guide, so that a cleaning gas passage is ensured on the annular channel 21 to the annular gap 13.
- a pressure membrane 18 is arranged, which is fastened in the upper part ring 3.
- a pressure chamber 19 is arranged on the side of the pressure diaphragm 18 opposite the pressure pin 26 and is operatively connected to the pressure generator 9 via the valve 10.
- the interior of the pressure body 8 is operatively connected via a valve 12 to a compressed air generator or container 11.
- the cleaning gas is in the interior of the pressure body 8 at a pressure of preferably about four bar. At the same time there is compressed air in the pressure chamber 19 with a control pressure of preferably six bar. The pressure difference presses the pressure membrane 18 in the direction of the valve seat 23, as a result of which the blocking body 24 moves downward and sits sealingly on the valve seat 23. So that no cleaning gas flows out through the annular gap 13. After sufficient particles adhere to the assigned filter element 17, the valve 10 is closed, the control command comes from the control 7.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Details Of Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/DE1998/001150 WO1999055442A1 (de) | 1998-04-24 | 1998-04-24 | Ringspaltinjektor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1073507A1 true EP1073507A1 (de) | 2001-02-07 |
Family
ID=6918636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98931998A Ceased EP1073507A1 (de) | 1998-04-24 | 1998-04-24 | Ringspaltinjektor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1073507A1 (de) |
| AU (1) | AU8207398A (de) |
| WO (1) | WO1999055442A1 (de) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1251933T3 (da) | 2000-02-02 | 2004-01-26 | Niro Atomizer As | Filterenhed til filtrering af gas |
| US20090205445A1 (en) * | 2008-02-14 | 2009-08-20 | Raether Thomas D | Method for selecting a filter element for a dust collector |
| DE202017107664U1 (de) * | 2017-12-15 | 2018-02-08 | Lübbers Anlagen- und Umwelttechnik GmbH | Heizraum zum Bereitstellen einer Wärme und Sprühtrockner zum Trocknen eines zu trocknenden Gutes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3004453A1 (de) * | 1980-02-07 | 1981-08-13 | Intensiv-Filter Gmbh & Co Kg, 5620 Velbert | Zwei-stufen-injektor zur abgasreinigung von staubfiltern |
| EP0225613A3 (de) * | 1985-12-10 | 1988-06-22 | Gebrueder Buehler Ag Maschinenfabrik | Filter für Luft und Gase |
| NZ244404A (en) * | 1991-09-19 | 1994-04-27 | Goyen Controls Co | Pilot operated diaphragm valve for delivering short duration high energy pressure pulses |
-
1998
- 1998-04-24 AU AU82073/98A patent/AU8207398A/en not_active Abandoned
- 1998-04-24 WO PCT/DE1998/001150 patent/WO1999055442A1/de not_active Ceased
- 1998-04-24 EP EP98931998A patent/EP1073507A1/de not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9955442A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8207398A (en) | 1999-11-16 |
| WO1999055442A1 (de) | 1999-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20001019 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DK ES FR GB GR IE LI NL PT |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: FT INTERNATIONAL B.V. |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: LUEBBERS, MATTHIAS |
|
| GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
| 17Q | First examination report despatched |
Effective date: 20010720 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
|
| 18R | Application refused |
Effective date: 20020126 |