EP0888518A1 - Device for thermal waste gas treatment, in particular of oxidizable low-temperature carbonisation gas - Google Patents
Device for thermal waste gas treatment, in particular of oxidizable low-temperature carbonisation gasInfo
- Publication number
- EP0888518A1 EP0888518A1 EP97917254A EP97917254A EP0888518A1 EP 0888518 A1 EP0888518 A1 EP 0888518A1 EP 97917254 A EP97917254 A EP 97917254A EP 97917254 A EP97917254 A EP 97917254A EP 0888518 A1 EP0888518 A1 EP 0888518A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust gas
- buffer cell
- buffer
- gas
- regenerators
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
- F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
- F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
- F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means
Definitions
- the invention relates to a device for thermal exhaust gas treatment, in particular of oxidizable carbonization gases, with the features of the preamble of claim 1. Furthermore, the invention relates to a specially designed buffer cell for use in connection with such a device.
- Devices which consist essentially of a reactor with two or more heat storage chambers or regenerators each with a heat store and a common heating zone assigned to the regenerators are suitable for the thermal exhaust gas treatment of oxidizable carbonization gases, an alternating arrangement of at least two regenerators with a heating zone located therebetween Exhaust gas to be treated is supplied from one side of the row arrangement.
- the first regenerator through which the supplied exhaust gas flows, or its heat accumulator, is used to heat the exhaust gas to be cleaned to a temperature sufficient to oxidize the carbonization gases.
- the regenerator or its heat accumulator which flows through after passing through the heating zone, serves to absorb the largest possible amount of heat from the cleaned exhaust gas.
- an auxiliary burner can be provided in the heating zone. If the energy generated during the oxidation process is not sufficient for an autothermal process, an auxiliary burner can be provided in the heating zone. If the heat accumulator of the downstream regenerator reaches a certain temperature, the gas supply direction is reversed, ie the exhaust gas to be cleaned is now fed to the previously downstream regenerator, so that its stored amount of heat can be used to heat up the exhaust gas to be cleaned. These switching times can either be determined by measuring the exhaust gas temperature or specified as fixed periods.
- Devices of this type can therefore, on average, ensure a sufficient degree of purification for the discharged gas, but non-tolerable emission peaks of the discharged exhaust gas can occur at the switching times.
- DE 29 51 525 A1 discloses a method and a device for treating a gas for removing impurities, in which a series connection of two heat storage chambers (regenerators) with an intermediate heating zone the exhaust gas to be cleaned is alternately supplied to one or the other chamber, but before the gas supply direction is switched, the gas supply is stopped and a purging process is carried out.
- the purging process is brought about by supplying already cleaned exhaust gas to the heat storage chamber which was the first to be flowed through by the exhaust gas to be cleaned before the gas supply was stopped. In this way, the unpurified gas volume initially still in this chamber is fed to the heating zone and finally to the downstream heat storage chamber.
- DE 29 51 525 A1 also proposes a method or a device using three heat storage chambers with a common heating zone, with a series connection of a first heat storage chamber, the heating zone and a second heat storage chamber Exhaust gas to be cleaned is fed and during a period between two switching points the gas volume still present in the third heat storage chamber is admixed with the exhaust gas to be cleaned supplied to the first heat storage chamber in order to effect a purging process for this heat storage chamber. In this case, already cleaned exhaust gas is drawn into the heat storage chamber to be flushed.
- the rinsed heat storage chamber can be used as the second (cooling) heat storage chamber and the chamber used before the switchover process as the second (cooling) heat storage chamber can be used as the first (heating) heat storage chamber.
- the chamber previously used as the first heat storage chamber can then be rinsed.
- the present invention is therefore based on the object of creating a device for thermal exhaust gas treatment, in particular of oxidizable carbonization gases, which can be subjected to continuous exhaust gas cleaning with as little effort as possible while maintaining the best possible thermal efficiency of the device enables.
- the invention solves this problem with the features of patent claim 1. Furthermore, the invention is based on the object of designing the buffer cell required for the device for thermal exhaust gas treatment in such a way that the dew point in the intermediate buffering of the uncleaned exhaust gases is avoided with little effort and simple manufacture.
- the buffer cell for buffering the before switching in the second, i.e. downstream gas volume contained in the regenerator and the recirculation of this buffered volume in the course of this period results in the advantage of essentially continuous exhaust gas purification with at the same time optimal thermal efficiency of the device and a relatively low additional effort compared to one consisting of only two regenerators with an intermediate one Heating zone existing device.
- the buffer cell can be designed as a preferably insulated container with a feed and an outlet opening. No further heat storage is required.
- the buffer cell is arranged in an exhaust line downstream of the row arrangement of the regenerators, a fan being arranged in the flow direction of the exhaust gas downstream of the buffer cell, which produces negative pressure towards the buffer cell.
- a further blower can also be provided in the recirculation line connecting the buffer cell and the row arrangement of the regenerators, which fan generates a sufficient negative pressure at the outlet opening of the buffer cell.
- the gas volume to be displaced from the buffer cell during the buffering process is fed to the downstream exhaust gas line and exhaust gas which has already been cleaned and is removed from the downstream exhaust gas line is used as the gas to be drawn in during the recirculation process.
- waste heat of the cleaned exhaust gas is fed to the buffer cell in the preferred embodiment of the invention. Regardless of whether cleaned exhaust gas or fresh air is drawn in during recirculation, mixing of the buffered, unpurified exhaust gas with the drawn-in gas can be prevented in the buffer cell by providing a displaceable piston or a, preferably flexible, membrane in the buffer cell .
- a buffer container for receiving the unpurified or only partially cleaned gas volume is provided for this purpose within a housing wall and cleaned exhaust gas can be fed to an intermediate space between the outside of the wall of the buffer container and the inside of the housing wall.
- part of the amount of heat contained in the cleaned exhaust gas can also be supplied to the buffered gas volume.
- the exhaust gas discharge opening of the buffer cell and also the ventilation and suction opening of the buffer container are connected to the intermediate space between the outside of the wall of the buffer container and the inside of the housing wall.
- a baffle and flow equalization device is preferably provided in the buffer container in the area of the ventilation and suction opening. This serves the purpose that, in the buffer phase, a stream of unpurified or only partially cleaned exhaust gas supplied via the gas supply opening of the buffer container does not reach the venting and suction opening of the buffer container without a substantial part of the cleaned gas volume contained in the buffer container must be ousted.
- the congestion and flow equalization device therefore serves to ensure correct buffer operation.
- the gas supply opening of the buffer container and the venting and suction opening of the buffer container and its inner wall can of course be designed with a suitable shape.
- Fig. 1 is a schematic representation of an embodiment of a device according to the invention.
- Fig. 2 shows a preferred embodiment of the buffer cell according to the invention.
- FIG. 1 of a device according to the invention for thermal exhaust gas treatment essentially consists of a regenerator unit 1, a buffer cell 3 and a chimney 5.
- regenerator unit 1 a regenerator unit 1
- buffer cell 3 a buffer cell 3
- chimney 5 a chimney 5
- the exhaust gas to be cleaned is fed to the regenerator unit 1 in the specified direction by means of an exhaust gas line 7.
- a first controllable valve 9 is arranged in the exhaust gas line 7, with which the flow of the exhaust gas to be cleaned to the relevant end of the regenerator unit 1 can be influenced.
- the valve 9 is preferably designed to be controllable by a control unit (not shown).
- the valve 9 can be controlled by the control unit at least in an on state and a blocked state. This also applies to all the valves mentioned below.
- a further controllable valve 13 is arranged in the exhaust line 11, which in turn enables or prevents the flow of the exhaust gas to be cleaned to the relevant end of the regenerator unit 1.
- a further exhaust gas line 15 or 17 branches off between the valve 9 or the valve 13 and the relevant end of the regenerator unit 1, which leads into a common exhaust gas line 19.
- the exhaust pipe 19 leads the cleaned exhaust gas to the chimney 5, a fan 21 being arranged in the exhaust pipe 19, preferably in front of the chimney 5.
- the blower 21 generates in the entire system between the exhaust pipe 7 and the exhaust pipe 19 the vacuum necessary for the operation of the device and supplies the exhaust gas to the chimney 5.
- the buffer cell 3 is connected in the exhaust line 19.
- the buffer cell 3 has a buffer container 23 in which an exhaust pipe 25 opens, which branches off from the exhaust pipe 19.
- a controllable valve 27 is provided in the exhaust gas line 25, which valve can release or block the inflow of exhaust gas into the buffer container 23.
- the exhaust line 19 connected to the exhaust lines 15 and 17 is led up to the housing 29 of the buffer cell 3.
- the housing 29 of the buffer cell 3 is designed such that it surrounds the buffer container 23 at least with its essential part.
- An intermediate space 33 is formed between the inside of the wall of the housing 29 and the outside of the wall of the buffer container 23, through which cleaned exhaust gas can flow. In this way, thermal energy can be supplied to the buffer container 23 or the gas volume V contained therein if the gas volume V should have a lower temperature. This can ensure that the gas volume V is not cooled to below the dew point even if the gas volume V remains inside the buffer container 23 for a long time.
- a recirculation line 37 branches off from the exhaust line 25, which connects the exhaust line 19 to the gas supply opening 35 of the buffer container 3 of the buffer cell 3, which in turn opens into the exhaust line 7 in front of the controllable valve 9 arranged therein and the branch of the exhaust line 11 .
- the recirculation line 37 but also have its own outlet in the buffer tank 23.
- the recirculation line 37 can have a smaller cross section than the other exhaust gas lines 7, 11, 15, 17 and 19.
- a controllable valve 39 can be arranged in the recirculation line 37, with which the gas flow through the recirculation line 37 can be released or blocked.
- this valve like all other valves, can be designed so that it also takes on the function of a throttle.
- FIG. 1 a further blower 41 is provided in the recirculation line 37, the function of which is clear from the following description of the device for thermal exhaust gas treatment shown in FIG. 1:
- the exhaust gas line 7 is supplied with exhaust gas to be cleaned from an exhaust gas generating system, which is not shown in detail.
- the valves are controlled by the control unit, not shown in detail, in the position shown in FIG. 1.
- the regenerator unit 1 consists, in a known manner, of a first regenerator 45 with a heat storage device 47 and a second regenerator 49 with a heat storage device 51.
- the exhaust gas to be cleaned which is supplied via the valve 13, reaches the second regenerator 49 and is heated by the heat stored in the heat storage element 51.
- the heated exhaust gas is additionally heated in a heating zone 53 formed between the two regenerators 45, 49 by means of one or more auxiliary burners 55 until the desired oxidation temperature, generally more than approx. 800 ° C., is reached.
- the desired oxidation temperature generally more than approx. 800 ° C.
- the pollutants carried along with the exhaust gas to be cleaned are oxidized and the exhaust gas is cleaned in this way.
- the oxidation can take place within the heating zone 53 or in the respective adjacent area of the subsequent regenerator, in this first phase in the adjacent area of the heat accumulator 47 of the first regenerator 45.
- the cleaned exhaust gas gives off energy to the heat accumulator in question, in the first phase to the heat accumulator 47 of the first regenerator.
- the cleaned and cooled gas then leaves the regenerator unit 1 via the exhaust line 15, for which purpose a controllable valve 57 provided in this exhaust line has been moved into the open position.
- the cleaned exhaust gas is supplied to the intermediate space 33 of the buffer cell 3 via the exhaust gas line 15, the exhaust gas line 19 and the valve 31 arranged therein, which was controlled in the open state. Since the valve 27 in the exhaust gas line 25 has been controlled into the blocked position, the cleaned exhaust gas cannot be supplied to the buffer tank 23 in this first phase. Most of the cleaned exhaust gas passes through the intermediate space 33 of the buffer cell 3 and the exhaust gas discharge opening 59 of the buffer cell 3 into the downstream part of the exhaust line 19 and is fed to the chimney 5.
- a small part of the exhaust gas reaches the interior of the buffer container via the ventilation and suction opening 61 of the buffer container 23. This is because a relatively small gas flow is always withdrawn from the gas volume V contained in the buffer tank 23 as a result of the open position of the valve 39 via the recirculation line 37 and recirculated into the exhaust gas line 7. A stream of cleaned exhaust gas corresponding to the steadily withdrawn gas stream is therefore drawn from the intermediate space 33 via the ventilation and suction opening 61 of the buffer container 23.
- the blower 41 provided in the recirculation line 37 which ensures a sufficiently large pressure difference between the exhaust gas supply opening 35 and the exhaust gas discharge opening 59, serves for the above-described drawing of cleaned exhaust gas.
- the device is designed by appropriate dimensioning of the blower 21 and the blower 41 and the exhaust gas lines so that there is also a negative pressure in the part of the recirculation line 37 between the blower 41 and the exhaust gas line 7.
- the first phase described above is ended as soon as the heat accumulator 47 in the first regenerator 45 exceeds a certain temperature and / or the heat accumulator 51 in the second regenerator 49 falls below a specific temperature. These switching times can either by the Measurement of the exhaust gas temperature determined or specified as fixed periods.
- valves 9, 13, 43, 57, 27 and 31 are controlled into the other position, so that the valve 9 is in the open position, the valve 13 in the closed position, the valve 43 in the open position, valve 57 is in the locked position, valve 27 is in the open position and valve 31 is in the closed position.
- the exhaust gas to be cleaned which is supplied via line 7, is fed via valve 9 to the first regenerator of regenerator unit 1.
- the supplied gas is in turn heated by taking energy from the heat accumulator 47, essentially oxidized in the heating zone 52 and cooled in the second regenerator 49 by releasing thermal energy to the heat accumulator stock 51.
- the exhaust gas emerging from the regenerator unit after the changeover process reaches the buffer tank 23 via the valve 43, the exhaust gas line 17, the exhaust gas line 19, the valve 27 and the exhaust gas line 25.
- This is essentially the gas volume that is present the switchover process has already been in the second regenerator 49. Since this gas volume has not passed through the heating zone 53, this is an essentially unpurified or at most partially cleaned gas volume.
- This gas volume is fed to the buffer container 23 of the buffer cell 3 in the second phase.
- the volume of the buffer container 23 must be selected at least as large as the gas volume which can be located in one of the regenerators 45 or 49 and the parts of the gas lines between the inlet of the regenerator in question and the valve upstream thereof.
- the volume V of unpurified gas contained in the buffer tank 23 is recirculated via the valve 39 and the recirculation line 37, as already described above, i.e. fed back to the exhaust line 7 with a relatively low gas flow. This phase must therefore be maintained at least until the entire volume V of unpurified or only partially purified exhaust gas has been completely recirculated in the buffer tank 23.
- valves 9, 13, 43, 57, 27 and 31 are in turn controlled in the opposite switching position, again leading to a supply of essentially unpurified or only partially cleaned exhaust gas from the first
- Regenerator 45 takes place in the interior of the buffer container 23.
- This fourth phase therefore differs from the second phase only in that the unpurified gas volume located in the other regenerator is buffered by means of the buffer cell 3.
- valves 27 and 31 are again reversed, as a result of which the state of the first phase described above is reached again.
- the recirculation of gas from the buffer tank 23 via the recirculation line 37 can preferably take place in each of the phases described above. This has the advantage that the regenerator unit 1 or the relevant a constant amount of gas is supplied to the regenerator 45 or 47.
- valve 39 provided in the recirculation line 37 only serves safety purposes, for example in the event of damage to the recirculation line 37 or a
- valve 39 the recirculation can only be made possible by means of the valve 39 in each case in a first time period during the first or third phase described above.
- a complete control of the exhaust gas supplied to the outgoing exhaust pipe 19 can be achieved by suitable control of the valves 27, 31 and 39.
- the continuous operation of the device is guaranteed.
- the possible blocking of the recirculation after the recirculation of the unpurified exhaust gas volume V contained in the buffer tank 23 is of little importance in this regard, since the amount of the recirculated gas is relatively small compared to the total flow of the exhaust gas supplied in the exhaust gas line 7.
- the recirculation can preferably take place continuously.
- FIG. 2a shows a preferred embodiment of the buffer cell 3 according to the invention.
- the buffer cell 3 is supplied with cleaned or unpurified exhaust gas via the exhaust line 19.
- the controllable valve 31 is provided in the exhaust gas line 19.
- the controllable valves in FIG. 2a are shown in the corresponding positions according to FIG. 1.
- the cleaned exhaust gas supplied via the exhaust line 19 and the valve 31 (Phase 1 or 3) is supplied to the annular space 33 between the inside of the wall 29a of the housing 29.
- the housing 29 of the buffer cell is provided in the usual way with insulation 29b, for example consisting of fiber material.
- the buffer container 23, which, like the housing 29 of the buffer cell 3, can be essentially cylindrical, has a conical shape at its rear end which opens into the ventilation and suction opening 61.
- an accumulation and flow equalization device 63 which can consist, for example, of a perforated plate.
- the device 63 has the effect that when untreated exhaust gas is supplied via the exhaust gas line 25 and the valve 27 of the gas stream entering the exhaust gas line 25 via the exhaust gas supply opening 35 of the buffer container, the gas flow into the buffer container 23 for ventilation is not substantially unimpeded - and
- Suction opening 61 arrives and the remaining cleaned exhaust gas contained in the buffer container 23 remains therein.
- the volume of the buffer tank 23 can be made larger by a safety factor, preferably 2 to 5, than the maximum in a regenerator 45 or 49 and the adjacent line sections maximum gas volume contained.
- the congestion and flow comparison device 63 has the effect that the cleaned exhaust gas from the intermediate space 33 only then, if possible, into the recirculation line via the ventilation and suction opening 61 37 arrives when the entire in the buffer tank 23rd lo
- FIGS. 2a and 2b ensures that a drop below the dew point temperature in the interior of the buffer container 23 is reliably avoided and is also simple in construction and thus inexpensive to manufacture.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
- Incineration Of Waste (AREA)
- Fuel Cell (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19611226 | 1996-03-21 | ||
DE19611226A DE19611226C1 (en) | 1996-03-21 | 1996-03-21 | Device for thermal exhaust gas treatment, in particular of oxidizable carbonization gases |
PCT/DE1997/000412 WO1997035149A1 (en) | 1996-03-21 | 1997-03-05 | Device for thermal waste gas treatment, in particular of oxidizable low-temperature carbonisation gas |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0888518A1 true EP0888518A1 (en) | 1999-01-07 |
EP0888518B1 EP0888518B1 (en) | 2000-09-06 |
Family
ID=7789021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97917254A Expired - Lifetime EP0888518B1 (en) | 1996-03-21 | 1997-03-05 | Buffer cell for an apparatus for thermal waste gas treatment, in particular of oxidizable carbonisation gas |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0888518B1 (en) |
AT (1) | ATE196191T1 (en) |
DE (2) | DE19611226C1 (en) |
WO (1) | WO1997035149A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19928214C2 (en) * | 1999-06-19 | 2001-09-13 | Ltg Mailaender Gmbh | Method and device for thermal cleaning of a raw gas |
TWI254780B (en) | 2001-05-29 | 2006-05-11 | Krantz Tkt Gmbh | Device for purifying contaminated waste gas |
DE102008037418B3 (en) | 2008-10-07 | 2010-02-18 | Reicat Gmbh | Process for the purification of exhaust gases by generative afterburning |
DE102011111529B4 (en) | 2011-08-31 | 2016-03-17 | Siegfried Woitkowitz | Process and apparatus for the catalytic, regenerative and thermal oxidation of combustible constituents in exhaust gases resulting from sorptive treatment of biogas |
WO2018232722A1 (en) * | 2017-06-23 | 2018-12-27 | General Electric Company | Regenerative thermal oxidizer system and method for operating regenerative thermal oxidizer system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3870474B1 (en) * | 1972-11-13 | 1991-04-02 | Regenerative incinerator systems for waste gases | |
JPS5589615A (en) * | 1978-12-26 | 1980-07-07 | Nittetsu Kakoki Kk | Improvement of treatment efficiency for regenerative type harmful-substance treatment furnace |
SE441623B (en) * | 1984-06-21 | 1985-10-21 | Heed Bjoern | PROCEDURE AND DEVICE FOR COMBUSTION AND / OR DISTRIBUTION OF POLLUTANTS |
DK161037C (en) * | 1988-10-17 | 1991-10-28 | Haldor Topsoe As | PROCEDURE AND PLANT TO CONTINUOUSLY CLEAN AN OXYGEN GAS FOR FLAMMABLE POLLUTIONS |
IT1259150B (en) * | 1992-09-07 | 1996-03-11 | Orv Spa | PERFECTED THERMAL DESTROYER |
US5376340A (en) * | 1993-04-15 | 1994-12-27 | Abb Air Preheater, Inc. | Regenerative thermal oxidizer |
-
1996
- 1996-03-21 DE DE19611226A patent/DE19611226C1/en not_active Expired - Fee Related
-
1997
- 1997-03-05 WO PCT/DE1997/000412 patent/WO1997035149A1/en active IP Right Grant
- 1997-03-05 AT AT97917254T patent/ATE196191T1/en not_active IP Right Cessation
- 1997-03-05 DE DE59702315T patent/DE59702315D1/en not_active Expired - Lifetime
- 1997-03-05 EP EP97917254A patent/EP0888518B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9735149A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE19611226C1 (en) | 1997-10-02 |
ATE196191T1 (en) | 2000-09-15 |
WO1997035149A1 (en) | 1997-09-25 |
DE59702315D1 (en) | 2000-10-12 |
EP0888518B1 (en) | 2000-09-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2516223C3 (en) | Method and device for regenerating adsorbent | |
EP2535650B1 (en) | Decontamination arrangement and method | |
EP1185352B1 (en) | Method for cleaning pipe-shaped filter elements | |
CH651374A5 (en) | DEVICE FOR OXYDING HEALTH MATTERS IN EXHAUST AND EXHAUST GAS. | |
DE19519868A1 (en) | Device for thermal exhaust air purification | |
DE60021782T2 (en) | Centrifuge with cooling by means of Ranque tube | |
DE3544466A1 (en) | VALVE SYSTEM, ESPECIALLY FOR EXHAUST GAS COMBUSTION SYSTEMS | |
DE69206878T2 (en) | Regenerative thermal combustion device | |
WO1997035149A1 (en) | Device for thermal waste gas treatment, in particular of oxidizable low-temperature carbonisation gas | |
DE69714923T2 (en) | Horizontal, regenerative, thermal oxidizer | |
DE60021936T2 (en) | Centrifuge with pneumatic drive and filtration of its housing atmosphere | |
DE202007003135U1 (en) | Refillable filter cartridge, useful for air filtration, e.g. in extractor hood, comprises housing with perforated circular inner and outer walls, central flow chamber, filter chanber between walls and outer flow channel | |
DE102016106225B4 (en) | Air treatment device and method | |
CH653759A5 (en) | DEVICE FOR THERMAL PURIFICATION OF EXHAUST GASES AND METHOD FOR THEIR OPERATION. | |
DE19728569B4 (en) | Heating, ventilation and / or air conditioning with integrated air filter, especially for motor vehicles | |
EP2228076A1 (en) | Method and device for disinfecting an area | |
EP2946828A1 (en) | Method for the purification of a flow of input gas containing oxidisable components and associated device | |
EP0832386B1 (en) | Switchable fluid distributor | |
EP1771683A1 (en) | Thermal postcombustion device and method for operating the same | |
DE19914614B4 (en) | Apparatus and method for cleaning an airflow supplied to the vehicle interior | |
EP1390667B1 (en) | Device for purifying contaminated waste gas | |
EP3750618B1 (en) | Method for purifying waste gases | |
EP0792183B1 (en) | Method of cleaning gases, in particular gases contaminated with chemical residues | |
DE3331768A1 (en) | Apparatus for the treatment of exhaust gases given off by heating plants | |
DE102017006416A1 (en) | industrial furnace |
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: 19980917 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT DE GB IT LU |
|
17Q | First examination report despatched |
Effective date: 19990119 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
RTI1 | Title (correction) |
Free format text: BUFFER CELL FOR AN APPARATUS FOR THERMAL WASTE GAS TREATMENT, IN PARTICULAR OF OXIDIZABLE CARBONISATION GAS |
|
RTI1 | Title (correction) |
Free format text: BUFFER CELL FOR AN APPARATUS FOR THERMAL WASTE GAS TREATMENT, IN PARTICULAR OF OXIDIZABLE CARBONISATION GAS |
|
17Q | First examination report despatched |
Effective date: 19990119 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT DE GB IT LU |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20000906 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20000906 |
|
REF | Corresponds to: |
Ref document number: 196191 Country of ref document: AT Date of ref document: 20000915 Kind code of ref document: T |
|
REF | Corresponds to: |
Ref document number: 59702315 Country of ref document: DE Date of ref document: 20001012 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES Effective date: 20001025 |
|
EN | Fr: translation not filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20010305 |
|
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 20000906 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20010323 Year of fee payment: 5 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020305 |