EP1390667A1 - Vorrichtung zur reinigung von schadstoffhaltigem abgas - Google Patents
Vorrichtung zur reinigung von schadstoffhaltigem abgasInfo
- Publication number
- EP1390667A1 EP1390667A1 EP02742763A EP02742763A EP1390667A1 EP 1390667 A1 EP1390667 A1 EP 1390667A1 EP 02742763 A EP02742763 A EP 02742763A EP 02742763 A EP02742763 A EP 02742763A EP 1390667 A1 EP1390667 A1 EP 1390667A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- heat storage
- raw
- gas line
- line
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2900/00—Special features of, or arrangements for incinerators
- F23G2900/70601—Temporary storage means, e.g. buffers for accumulating fumes or gases, between treatment stages
Definitions
- the invention relates to a device for the purification of pollutant-containing exhaust gas by regenerative thermal afterburning, with a raw gas line, at least one reaction chamber with an energy supply device, at least two heat storage masses, a clean gas line and at least one gas storage, raw gas being preheatable when passing through a heat storage mass
- Preheated tubular gas can be oxidized in the reaction chamber and the resulting heated clean gas can be cooled when it is passed through another heat storage mass and the cooled clean gas can be introduced into the clean gas line, the direction of passage in the heat storage masses being reversible and, after a reversal process, raw gas entering the clean gas line into a gas storage unit connected to the clean gas line can be temporarily stored and can then be returned to the raw gas line from there.
- Such regenerative afterburning plants belong to the group of thermal exhaust air purification plants, with which typically pollutant gases, such as occur in painting or laminating processes, are heated at least to such an extent that the mostly gaseous pollutants react to less critical oxidation products due to the oxidation.
- hydrocarbons are preferably oxidized to carbon dioxide and water.
- RNV systems are characterized in that a large proportion of the required raw gas heating takes place through heat recovery by means of the heat storage masses, which have previously been heated with the aid of the heated clean gas.
- Such a device is known for example from DE 19611226 Cl.
- a first heat storage mass is cooled to a certain temperature by incoming raw gas and a second heat storage mass is heated to a certain temperature by the heated clean gas
- the direction of flow through the reaction chamber and the two heat storage masses is reversed in order to heat the second, now heated, heat storage mass
- the heat released during the oxidation of the pollutants and the additional amount of heat supplied, for example in the form of fuel, depending on the energy content of the raw gas in the reaction chamber thus “oscillates” between the two heat storage masses, so that an overall very high energy efficiency of such regenerative ones Post-combustion plants results.
- the period immediately after the flow direction in the heat storage masses is reversed is fundamentally problematic in such systems.
- the pollutant-containing raw gas which is warming up in the raw gas and which has already cooled relatively far at the time of the changeover, could leave the plant unpurified if the flow direction is reversed.
- the known devices are often designed with more than two heat storage masses, so that after the switching process, the heated clean gas is introduced into a third heat storage mass, and the raw gas which has not yet been oxidized continues to be fed to the reaction chamber from the heat storage mass which had previously flowed through it.
- a heat storage mass previously used for the raw gas heating is thus only used for the passage of clean gas according to this procedure, i.e.
- the gas storage device is essentially completely surrounded by another container.
- An intermediate space is formed between the inside of the housing walls and the outside of the wall of the gas storage device, through which cleaned exhaust gas can flow.
- thermal energy can be supplied to the gas storage, that is to say the raw gas or incompletely purified gas contained therein, if the stored gas volume has a lower temperature than the exhaust gas flowing past.
- cooling of the stored gas volume can be avoided even if the gas volume remains in the interior of the gas store for a long time.
- expensive insulation of the wall of the gas storage can be dispensed with, even if the gas storage is set up outdoors and the ambient temperatures are very low.
- the gas store itself like the housing surrounding it, is essentially cylindrical and has a conical shape at its rear end, which opens into the clean gas line.
- a congestion and flow equalization device is provided in the interior of the gas storage device, which can consist, for example, of a perforated plate.
- This flow equalization device has the effect that if untreated exhaust gas is introduced into the intermediate store after the flow direction has been switched, it cannot pass unhindered from the gas store into the clean gas line.
- the temporarily stored exhaust gas is to be removed from the gas storage in the sequence in which it was introduced into it.
- the boundary between the temporarily stored raw gas and the displaced clean gas should shift back and forth in the gas storage as free of mixing as possible.
- the invention is based on the object of proposing a device for cleaning pollutant-containing exhaust gas by regenerative thermal afterburning, in which a gas for intermediate storage after a switchover process during the changeover between heat storage masses can be conducted into the gas storage unit with as little back pressure as possible, the reliability of the filling - and the emptying process should be as high as possible.
- the gas storage device consists essentially entirely of a flexible, flaccid shell, which can be filled with gas up to a state in which the shell takes on a tight shape ,
- the use of a closed gas storage means that the intermixing of the temporarily stored gas with the clean gas or atmospheric air, i.e. the undesired increase in volume of the stored gas, does not occur. Due to the flexibility of the wall, almost no back pressure has to be overcome during the filling of the gas storage device according to the invention, i.e. almost no excess pressure can be built up inside the gas storage or on the side of the supply line. In this way, undesirable pressure fluctuations in the overall system of the device can be reduced to a minimum.
- the filling process of the flexible, flaccid casing is terminated at the latest when it takes on an elongated, taut shape without any forces being created to stretch and thus reduce the volume of the casing.
- the gas storage tank is emptied with the aid of a suction device which is already present on the raw or clean gas side and by means of which the gas storage tank can be completely emptied by generating negative pressure until the flexible, flaccid casing is folded up.
- the casing consists of an essentially gas-impermeable fabric made of temperature-resistant fibers, the fabric being able to be provided with a surface coating and / or surface finishing. Tissues can be produced in a rational and inexpensive manner, and a self-contained cover can be easily made from several pieces of fabric.
- an absolute tightness is not necessary, since slight raw gas transfers into the clean gas or directly into the atmosphere are tolerable. For example, sealing the seams is usually not necessary.
- the fibers of the fabric preferably consist of an aramid, polyethylene or polytetrafluoroethylene.
- thermo-resistant foils for the flexible cover.
- the invention provides for a central rigid gas filling and emptying device to be arranged in the interior of the casing Entry and / or exit opening of the gas accumulator goes out.
- a cylindrical hollow body as the gas filling and emptying device, one end face of which forms the inlet and / or outlet opening of the gas reservoir and the jacket of which is provided with a plurality of through openings. This ensures a large-area distribution of the gas flow entering or exiting, so that there is no need to fear that the filling or removal cross-sections will be closed by tightly abutting a section of the casing against a single inlet or outlet opening.
- the gas filling and emptying device is particularly advantageous to design the gas filling and emptying device as a perforated plate cylinder.
- the casing within a closed container. As a result, the heat loss of the stored gas can be reduced.
- Unhindered filling and emptying of the gas reservoir is made possible if the space between the container and the casing is connected to the atmosphere via at least one breathing opening. If the intermediate space between the container and the casing is connected to the clean gas line, warm clean gas is introduced into the intermediate space during the emptying of the gas store as the temporarily stored gas is withdrawn again from the intermediate store. As a result, thermal energy is also supplied to the temporarily stored gas, which prevents undesired cooling, that is to say also condensation of the temporarily stored gas. When the intermediate store is refilled, as much now cooled clean gas is pushed back into the clean gas line from the intermediate space as the amount of temporarily stored gas is taken up in the gas store.
- Clean gas can flow through the space between the container and the casing.
- the volume of the container has at most the same size as the volume of the flexible casing in the state in which it takes on a taut shape.
- two heat storage masses are assigned to a reaction chamber, with only one gas storage unit being assigned to a plurality of modules each consisting of two heat storage masses and one reaction chamber.
- Figure 1 is a cleaning device with two heat storage masses and a gas storage surrounded by the atmosphere. 2 as in FIG. 1, but with a gas reservoir surrounded by a container;
- Fig. 3 shows a device with four heat storage masses, each working in pairs with a reaction chamber, with only one central gas storage and
- Fig. 4 is an enlarged view of the gas storage according to Figures 1 to
- the blower 8 ensures that there is a flow first through the left heat storage mass 4, then the reaction chamber 5 and then the right heat storage mass 4, from where the gas passes through the blower 8 into the clean gas line 7 and then into the atmosphere. It should also be assumed that the left heat storage mass 4 has heated up at the time in question and that the right heat storage mass 4 has cooled.
- the raw gas entering the left heat storage mass 4 through the raw gas line 2 is heated there in order, if necessary, to be brought to such a temperature level by further energy supply in the reaction chamber 5 that in the reaction chamber 5 and during the subsequent flow in the heat storage mass 4 an oxidation of the Pollutants to uncritical oxidation products takes place.
- the oxidation represents an exothermic reaction, so that this causes a further temperature increase in the right heat storage mass 4.
- the cleaned exhaust gas leaves the system after passing through the blower 8 as clean gas through the clean gas line 7.
- the left heat storage mass 4 is continuously cooled while maintaining this operating state, while the right heat storage mass 4 continues to heat up.
- the heat storage masses 4 consist of high temperature resistant inorganic materials, for. B. ceramic elements, which are stacked one above the other in the containers 3, that a high surface-volume ratio arises.
- shut-off flaps 11 to 14 are switched simultaneously
- the shut-off valves 15 and 16 are changed in their switching state, so that an exhaust gas escape through the shut-off valve 16 is prevented and rather the uncleaned raw gas is fed into the gas storage device 9.
- the gas storage device 9 consists of a flexible, flaccid casing made of a fabric or a film, the fibers of which, e.g. are made of polytetrafluoroethylene.
- the surface of this fabric can e.g. B. coated with silicone or polyurethane to improve its tightness against gas passage.
- the gas reservoir 9 is now filled up to a state as represented by the dotted line.
- the flexible cover has taken on an almost taut shape in this state without the fabric being stretched.
- the gas storage 9 can be filled almost without excess pressure from the clean gas line 7, so that extremely low blower outputs are required.
- the back pressure when filling the gas reservoir is only slightly greater than it is when the shut-off valve 16 is open to discharge the clean gas into the atmosphere.
- the raw gas is preheated as it flows through the hot right heat storage mass 4, brought to the required oxidation temperature in the reaction chamber 5 and cooled in the left heat storage mass while heating the same.
- the basic principle of an RNV system is therefore that thermal energy is alternately stored in at least two heat storage masses 4 and is recovered therefrom for crude gas heating.
- the raw gas temporarily stored in the filled gas stores 9 is returned to the raw gas line 2 via the valve 10 during the further operation of the device 1, in order to be introduced from there into the heat storage mass 4 which is currently active for preheating purposes and then to be oxidized.
- the passage through the adjustable valve 10 in the recirculation line is set so that the temporarily stored gas volume is completely returned before the next switching operation of the butterfly valves 12 to 14 occurs and the gas accumulator 9 has to absorb unpurified exhaust gas again for temporary storage.
- the gas store 9 ′ is arranged in this case within a closed, rigid, cuboid-shaped container 22.
- the intermediate space 25 located between the casing 23 and the inside 24 of the container 22 is in constant communication with the free end of the clean gas line 7 via a breathing line 26.
- the intermediate space 25 therefore acts as insulation for the gas arranged within the casing 23 or even as a heating device for this gas volume. Unwanted condensations of pollutants within this unpurified exhaust gas can thus be safely avoided.
- the clean gas from the intermediate space 25 is gradually displaced from the intermediate space 25 as part of the enlargement of the casing 23 and flows through the breathing line 26 and the end of the clean gas line 7 in the atmosphere. As a result of the Ending emptying of the gas storage 9, hot clean gas is sucked into the intermediate space 25 again.
- the device 21 shown in Figure 2 is particularly useful when the gas storage 9 'must or should be installed outdoors and / or when the dew point of the pollutants contained in the temporarily stored raw gas is very low.
- FIG. 3 shows an alternative device 31 which has a total of four heat storage masses 4. Two of these heat storage masses are provided in pairs with a reaction chamber 5 and an associated heating device 6 and form a module M. All four heat storage masses 4 obtain the raw gas from a common raw gas line 2 or discharge the clean gas emerging from them into a common clean gas line 7 , in which a single fan 8 is installed.
- the device 31 furthermore has only a single gas store 9, which, as in FIG. 1, is not assigned to a container.
- the two modules M each consisting of two heat storage masses 4 and a reaction chamber 5, can either be operated in synchronism, that is, in such a way that all butterfly valves switch over simultaneously.
- a large volume of unpurified exhaust gas accumulates in the clean gas line 7 for a short time and is trapped in the gas storage 9.
- the temporarily stored gas volume can then be returned to the heated heat storage masses 4 via the recirculation line.
- the device according to FIG. 3 is distinguished by the fact that it can be designed for a wide variety of outputs (volume flows) on a very economical basis.
- the unchanged modules M which are particularly inexpensive to manufacture in large quantities as identical parts, can be juxtaposed in the required number, i.e. parallel to each other. Basically, regardless of the number of modules M, only a single gas storage 9 can be used.
- FIG. 4 shows an enlarged structure of the gas storage device 9 in two dotted states of the envelope 23. Inside the envelope 23 there is a central one - left
- the cover 23 is provided on its upper side with a schematically indicated holding element 28, which is connected, for example, to a suitable holding device, not shown, which fixes the upper side of the cover 23 at a certain level both in the emptied and in the filled state of the gas storage device 9.
- the hollow body 27 On the underside of the hollow body 27, the latter passes into a feed and discharge line 29.
- the open end face 30 of the hollow body 27 forms an inlet and outlet opening for the gas reservoir 9.
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
- Treating Waste Gases (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Gas Separation By Absorption (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
Claims
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10125980 | 2001-05-29 | ||
| DE10125980 | 2001-05-29 | ||
| DE10127105 | 2001-06-05 | ||
| DE10127105 | 2001-06-05 | ||
| PCT/DE2002/001796 WO2002097329A1 (de) | 2001-05-29 | 2002-05-18 | Vorrichtung zur reinigung von schadstoffhaltigem abgas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1390667A1 true EP1390667A1 (de) | 2004-02-25 |
| EP1390667B1 EP1390667B1 (de) | 2007-07-18 |
Family
ID=26009426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02742763A Expired - Lifetime EP1390667B1 (de) | 2001-05-29 | 2002-05-18 | Vorrichtung zur reinigung von schadstoffhaltigem abgas |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1390667B1 (de) |
| AT (1) | ATE367559T1 (de) |
| CZ (1) | CZ20032870A3 (de) |
| DE (2) | DE10292349D2 (de) |
| PL (1) | PL197784B1 (de) |
| TW (1) | TWI254780B (de) |
| WO (1) | WO2002097329A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006058696B4 (de) * | 2006-12-13 | 2008-12-18 | Eisenmann Anlagenbau Gmbh & Co. Kg | Vorrichtung zur regenerativen Nachverbrennung von klebrigen Schadstoffpartikeln in Abgas und Verfahren zum Betreiben einer solchen |
| DE102014107030A1 (de) * | 2014-05-19 | 2015-11-19 | Caverion Deutschland GmbH | Verfahren zur Reinigung eines oxidierbare Bestandteile enthaltenen Rohgasvolumenstroms sowie zugehörige Vorrichtung |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5453259A (en) * | 1994-04-18 | 1995-09-26 | Smith Engineering Company | Two-bed regenerative thermal oxidizer with trap for volatile organic compounds |
| US5730945A (en) * | 1996-03-11 | 1998-03-24 | Durr Environmental, Inc. | Purge retention chamber incorporated into RTO inlet manifold |
| DE19611226C1 (de) | 1996-03-21 | 1997-10-02 | Fhw Brenntechnik Gmbh | Vorrichtung zur thermischen Abgasbehandlung, insbesondere von oxidierbaren Schwelgasen |
| US5931663A (en) * | 1997-02-27 | 1999-08-03 | Process Combustion Corporation | Purge system for regenerative thermal oxidizer |
| US6042791A (en) * | 1998-04-20 | 2000-03-28 | Johnson; Allan M. | Pressure and VOC concentration wave damping for a thermal oxidizer |
| FR2783900B1 (fr) * | 1998-09-29 | 2001-01-05 | Pillard Chauffage | Incinerateur thermique regeneratif de composes organiques volatile a travers des lits de materiau |
-
2002
- 2002-05-16 TW TW091110211A patent/TWI254780B/zh not_active IP Right Cessation
- 2002-05-18 DE DE10292349T patent/DE10292349D2/de not_active Expired - Fee Related
- 2002-05-18 DE DE50210512T patent/DE50210512D1/de not_active Expired - Lifetime
- 2002-05-18 CZ CZ20032870A patent/CZ20032870A3/cs unknown
- 2002-05-18 WO PCT/DE2002/001796 patent/WO2002097329A1/de not_active Ceased
- 2002-05-18 EP EP02742763A patent/EP1390667B1/de not_active Expired - Lifetime
- 2002-05-18 PL PL366521A patent/PL197784B1/pl not_active IP Right Cessation
- 2002-05-18 AT AT02742763T patent/ATE367559T1/de active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02097329A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ20032870A3 (cs) | 2004-03-17 |
| DE10292349D2 (de) | 2004-04-29 |
| TWI254780B (en) | 2006-05-11 |
| EP1390667B1 (de) | 2007-07-18 |
| ATE367559T1 (de) | 2007-08-15 |
| PL197784B1 (pl) | 2008-04-30 |
| PL366521A1 (en) | 2005-02-07 |
| DE50210512D1 (de) | 2007-08-30 |
| WO2002097329A1 (de) | 2002-12-05 |
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