EP0587064A1 - Thermische Entsorgungseinheit - Google Patents

Thermische Entsorgungseinheit Download PDF

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Publication number
EP0587064A1
EP0587064A1 EP93114149A EP93114149A EP0587064A1 EP 0587064 A1 EP0587064 A1 EP 0587064A1 EP 93114149 A EP93114149 A EP 93114149A EP 93114149 A EP93114149 A EP 93114149A EP 0587064 A1 EP0587064 A1 EP 0587064A1
Authority
EP
European Patent Office
Prior art keywords
thermal
disposal unit
gas
duct
unit according
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.)
Withdrawn
Application number
EP93114149A
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English (en)
French (fr)
Inventor
Franca Coin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ORV Ovattificio Resinatura Valpadana SpA
Original Assignee
ORV Ovattificio Resinatura Valpadana SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ORV Ovattificio Resinatura Valpadana SpA filed Critical ORV Ovattificio Resinatura Valpadana SpA
Publication of EP0587064A1 publication Critical patent/EP0587064A1/de
Withdrawn legal-status Critical Current

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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
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L2900/00—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber
    • F23L2900/15021—Special arrangements for supplying or treating air or oxidant for combustion; Injecting inert gas, water or steam into the combustion chamber using regenerative heat exchanger bodies with different layers of material

Definitions

  • the present invention relates to a thermal disposal unit; more particularly, it relates to a regenerative thermal disposal unit.
  • the generated pollutants are phenol, formaldehyde and ammonia; these substances are currently eliminated by regenerative reheating, i.e. in a process in which recovery of the heat contained in the outgoing purified gases occurs by direct contact between the gases and a mass of material capable of accumulating and giving back heat without interposing exchange surfaces.
  • the heat generated in thermal disposal is also used to heat the raw materials during the process.
  • a first type of regenerative thermal disposal unit used downstream of industrial processes which emit gaseous pollutants comprises a combustion chamber with which two thermal buffers are connected; each buffer is constituted by an accumulation mass made of refractory material, generally a mass of ceramic fragments having the most disparate shapes.
  • Each one of the thermal buffers is selectively connected, on the side opposite to the combustion chamber, to a forced-flow duct for gas to be purified and to a forced-flow duct for the emission of purified gases.
  • the polluted gas to be purified passes into the combustion chamber through the first thermal buffer and then into the second thermal buffer and into the stack or flue through the emission duct.
  • the first thermal buffer transfers heat to the incoming cold gas
  • the second thermal buffer stores heat contained in the gas which has just flowed through the combustion chamber.
  • the flows are reversed and the gas to be purified passes through the second thermal buffer, the combustion chamber, the first thermal buffer and then flows into the stack.
  • the quality of the emission discharged into the atmosphere is intolerable, since any pollutants which have remained trapped for example in the first buffer and have not passed into the combustion chamber are removed and thus discharged into the environment without being eliminated.
  • thermal buffers which are used in a cyclic manner to: transfer heat to the cold gas entering the combustion chamber; accumulate the heat of the hot gas arriving from the combustion chamber; flush the mass before using it to accumulate the heat contained in the outgoing purified gas; incinerate the residues which have accumulated in the mass and which simple flushing has failed to remove.
  • An aim of the present invention is to provide an improved regenerative thermal disposal unit which provides an equivalent performance despite constructive solutions which are simpler and less expensive than those described above.
  • a primary object is to maximize the total heat accumulation capacity and minimize the cost of the material to be used.
  • Another important object is to have direct and immediate use of all the heat required for the technological cycle to which the thermal disposal unit is coupled.
  • Another important object is to eliminate the flushing and incineration sections despite eliminating uncontrolled emissions.
  • Another object is to provide a thermal disposal unit which can be constructed with conventional equipment and facilities.
  • the invention provides an improved thermal disposal unit of the type which comprises a combustion chamber to which a plurality of thermal buffers are connected, each thermal buffer being constituted by an accumulation mass adapted for exchanging heat with flowing gas, each one of said thermal buffers being selectively connected, on the side opposite to the combustion chamber, to a forced-flow duct for gas to be purified and to a forced-flow duct for gas emission, said thermal disposal unit being characterized in that said emission duct is selectively connected to a chamber acting as a plenum chamber and constantly connected to the intake region of said duct for the gas to be purified.
  • said chamber acting as a plenum chamber is open onto the atmosphere, since it constitutes part of a stack which is divided into two selectable chambers, the other chamber being suitable for the discharge of the purified gases into the atmosphere.
  • two thermal buffers may be provided.
  • the accumulation mass is diversified by layers, from the side closest to the combustion chamber to the opposite side.
  • a regenerative thermal disposal unit comprises, within an appropriate refractory external covering 10, a combustion chamber 11, with an associated burner 12, which is arranged above two thermal buffers, respectively 13 and 14, which each have an upper part connected to said chamber.
  • Each one of said thermal buffers is constituted by an accumulation mass suitable to exchange heat with the flowing gas.
  • the accumulation mass is diversified by layers which are constituted, from the side closest to the combustion chamber to the opposite side, by a first layer, respectively 13a and 14a, of sintered silica pellets; by a layer, respectively 13b and 14b, made of small pieces of ceramic material which expediently have a small saddle-like shape; and by a stack, respectively 13c and 14c, of layers of drawn iron net.
  • the thermal buffers 13 and 14 are connected to a duct 17 for gas to be purified, respectively by means of ducts 15 and 16; said duct 17 is conveniently of the forced-flow type by means of a blower 18.
  • the ducts 15 and 16 can be closed by means of high-efficiency (high-tightness) gates, respectively 19 and 20, which are located at their outlets into the thermal buffers 13 and 14.
  • thermal buffers 13 and 14 are connected, respectively by means of ducts 21 and 22, to a gas emission duct 23 which is conveniently of the forced-flow type which is activated by means of a blower 24.
  • the ducts 21 and 22 can be closed by means of high-efficiency (high-tightness) gates, respectively 25 and 26, which are located at the outlets of said ducts into the thermal buffers 13 and 14.
  • the gas emission duct 23 ends with a stack or flue 27 which is open onto the atmosphere and is longitudinally divided into two chambers, respectively 27a and 27b, the inlet whereof can be closed by means of high-efficiency (high-tightness) gates, respectively 28 and 29.
  • One of these chambers acts as plenum chamber and is constantly connected by means of a duct 30 to the intake of the blower 18 of the duct 17.
  • the thermal disposal unit is completed by a duct 31 for conveying the hot gases from the combustion chamber to the area where the industrial process to which it is coupled is used, and by a gas recycling duct 32 which connects the delivery of the blower 18 to the duct 31 and is suitable to adjust the temperature of the hot gas sent to the user.
  • the gas to be purified as illustrated in figure 1, drawn by the blower 18, is fed into the thermal buffer 13, with the gate 19 open and the gate 25 closed; the gas is preheated and passes into the combustion chamber 11 and then into the thermal buffer 14, purging it from the residues accumulated during its preceding function of preheating the polluted gas.
  • the flushing gas with the gate 20 closed and the gate 26 open, is sent into the chamber 27b of the stack 27, with the gate 28 closed and the gate 29 open.
  • the large available volume of the chamber 27b acts as a plenum chamber.
  • Very hot gases present in the combustion chamber 11 are recycled for use in an amount which is more than sufficient to provide all the heat required by the technological process.
  • the gas to be purified, drawn by the blower 18, is fed into the thermal buffer 13, with the gate 19 open and the gate 25 closed, and is preheated therein.
  • the gas then flows into the combustion chamber 11 and preheats the thermal buffer 14 (where by this time all the residues have been eliminated).
  • the flushing gas previously accumulated in the chamber 27b of the stack 27, continues to be drawn by the blower 18 so as to be subjected to further purification.
  • the large volume of the chamber 27b provides the time necessary for the progressive elimination of all the substances accumulated therein during the purging of the thermal buffer 14.
  • the gas to be purified, drawn by the blower 18, is fed into the thermal buffer 14, with the gate 20 open and the gate 26 closed, and is preheated therein.
  • the gas then flows into the combustion chamber 11 and purges the thermal buffer 13.
  • the flushing gas is sent into the chamber 27b of the stack 27 to be sent conditioning through the duct 30, by means of which it is connected to the intake of the blower 18.
  • the chamber 27b still acts as plenum chamber, whereas the chamber 27a, discharges into the atmosphere the gases which are fully oxidized and contain no pollutants.
  • the thermal disposal unit thus effects a flushing process taken to the limit of incineration.
  • the emission of polluted gas produced by purging/flushing is confined in one of the two chambers into which the stack is divided, and said chamber is constantly connected to the negative-pressure branch upstream of the thermal disposal unit.
  • thermal disposal unit resides in that 100% of the heat required for the technological process is produced in the combustion chamber.
  • the materials employed may be any according to the requirements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)
EP93114149A 1992-09-07 1993-09-03 Thermische Entsorgungseinheit Withdrawn EP0587064A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITPD920157A IT1259150B (it) 1992-09-07 1992-09-07 Termodistruttore perfezionato
ITPD920157 1992-09-07

Publications (1)

Publication Number Publication Date
EP0587064A1 true EP0587064A1 (de) 1994-03-16

Family

ID=11390049

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93114149A Withdrawn EP0587064A1 (de) 1992-09-07 1993-09-03 Thermische Entsorgungseinheit

Country Status (2)

Country Link
EP (1) EP0587064A1 (de)
IT (1) IT1259150B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997022835A1 (de) * 1995-12-15 1997-06-26 Bwt Aktiengesellschaft Verfahren und anlage zum reinigen von verschmutzten abgasen
WO1997035149A1 (de) * 1996-03-21 1997-09-25 Fhw-Brenntechnik Gmbh Vorrichtung zur thermischen abgasbehandlung, inbesondere von oxidierbaren schwelgasen
WO1997042439A1 (de) * 1996-05-03 1997-11-13 Freimut Joachim Marold Schaltbarer verteiler für fluide
WO1998019776A1 (en) * 1996-11-01 1998-05-14 Engelhard Corporation Horizontal regenerative catalytic oxidizer
FR2783900A1 (fr) * 1998-09-29 2000-03-31 Pillard Chauffage Incinerateur thermique regeneratif de composes organiques volatile a travers des lits de materiau
EP1063470A2 (de) * 1999-06-19 2000-12-27 LTG Mailänder GmbH Verfahren und Vorrichtung zur thermischen Reinigung eines Rohgases
US6261092B1 (en) 2000-05-17 2001-07-17 Megtec Systems, Inc. Switching valve
EP1312861A3 (de) * 2001-11-14 2003-12-03 Dürr Environmental GmbH Abluftreinigungsvorrichtung
US6669472B1 (en) 2002-08-28 2003-12-30 Megtec Systems, Inc. Dual lift system
US6749815B2 (en) 2001-05-04 2004-06-15 Megtec Systems, Inc. Switching valve seal
US7150446B1 (en) 2002-08-28 2006-12-19 Megtec Systems, Inc. Dual lift system
US7325562B2 (en) 2002-05-07 2008-02-05 Meggec Systems, Inc. Heated seal air for valve and regenerative thermal oxidizer containing same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404965A (en) * 1964-11-13 1968-10-08 Benjamin P. Shiller Fume combustion apparatus
FR2473695A1 (fr) * 1980-01-09 1981-07-17 Pechiney Aluminium Echangeur-recuperateur de chaleur a inversion de cycle et application a la recuperation de chaleur dans les fumees de fours a flammes
WO1986000389A1 (en) * 1984-06-21 1986-01-16 Heed Bjoern Process for combustion or decomposition of pollutants and equipment therefor
EP0365262A1 (de) * 1988-10-17 1990-04-25 Haldor Topsoe A/S Verfahren und Einrichtung zur kontinuierlichen Reinigung eines Sauerstoffenthaltenden Gases von Brennbaren Schadstoffen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3404965A (en) * 1964-11-13 1968-10-08 Benjamin P. Shiller Fume combustion apparatus
FR2473695A1 (fr) * 1980-01-09 1981-07-17 Pechiney Aluminium Echangeur-recuperateur de chaleur a inversion de cycle et application a la recuperation de chaleur dans les fumees de fours a flammes
WO1986000389A1 (en) * 1984-06-21 1986-01-16 Heed Bjoern Process for combustion or decomposition of pollutants and equipment therefor
EP0365262A1 (de) * 1988-10-17 1990-04-25 Haldor Topsoe A/S Verfahren und Einrichtung zur kontinuierlichen Reinigung eines Sauerstoffenthaltenden Gases von Brennbaren Schadstoffen

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997022835A1 (de) * 1995-12-15 1997-06-26 Bwt Aktiengesellschaft Verfahren und anlage zum reinigen von verschmutzten abgasen
WO1997035149A1 (de) * 1996-03-21 1997-09-25 Fhw-Brenntechnik Gmbh Vorrichtung zur thermischen abgasbehandlung, inbesondere von oxidierbaren schwelgasen
WO1997042439A1 (de) * 1996-05-03 1997-11-13 Freimut Joachim Marold Schaltbarer verteiler für fluide
DE19617790A1 (de) * 1996-05-03 1997-11-13 Freimut Joachim Marold Verfahren und Vorrichtung zur regenerativen Nachverbrennung und schaltbarer Verteiler für Fluide
WO1998019776A1 (en) * 1996-11-01 1998-05-14 Engelhard Corporation Horizontal regenerative catalytic oxidizer
US5874053A (en) * 1996-11-01 1999-02-23 Automotive Systems Laboratory, Inc. Horizontal regenerative catalytic oxidizer
FR2783900A1 (fr) * 1998-09-29 2000-03-31 Pillard Chauffage Incinerateur thermique regeneratif de composes organiques volatile a travers des lits de materiau
EP0990848A1 (de) * 1998-09-29 2000-04-05 Entreprise Generale De Chauffage Industriel Pillard Verfahren zum thermischen Reinigen von Gasen und regenerative thermische Verbrennungsvorrichtung
EP1063470A2 (de) * 1999-06-19 2000-12-27 LTG Mailänder GmbH Verfahren und Vorrichtung zur thermischen Reinigung eines Rohgases
EP1063470A3 (de) * 1999-06-19 2001-10-24 LTG Mailänder GmbH Verfahren und Vorrichtung zur thermischen Reinigung eines Rohgases
US6261092B1 (en) 2000-05-17 2001-07-17 Megtec Systems, Inc. Switching valve
US6749815B2 (en) 2001-05-04 2004-06-15 Megtec Systems, Inc. Switching valve seal
US6899121B2 (en) 2001-05-04 2005-05-31 Megtec Systems Inc. Switching valve seal
EP1312861A3 (de) * 2001-11-14 2003-12-03 Dürr Environmental GmbH Abluftreinigungsvorrichtung
US7325562B2 (en) 2002-05-07 2008-02-05 Meggec Systems, Inc. Heated seal air for valve and regenerative thermal oxidizer containing same
US6669472B1 (en) 2002-08-28 2003-12-30 Megtec Systems, Inc. Dual lift system
US6783111B2 (en) 2002-08-28 2004-08-31 Megtec Systems Inc. Dual lift system
US7150446B1 (en) 2002-08-28 2006-12-19 Megtec Systems, Inc. Dual lift system

Also Published As

Publication number Publication date
IT1259150B (it) 1996-03-11
ITPD920157A0 (it) 1992-09-07
ITPD920157A1 (it) 1994-03-07

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