EP0479937B1 - Dispositif destines a des installations de purification de gaz, empechant la decharge de gaz non purifie lors de changements du sens d'ecoulement de gaz - Google Patents

Dispositif destines a des installations de purification de gaz, empechant la decharge de gaz non purifie lors de changements du sens d'ecoulement de gaz Download PDF

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Publication number
EP0479937B1
EP0479937B1 EP90917830A EP90917830A EP0479937B1 EP 0479937 B1 EP0479937 B1 EP 0479937B1 EP 90917830 A EP90917830 A EP 90917830A EP 90917830 A EP90917830 A EP 90917830A EP 0479937 B1 EP0479937 B1 EP 0479937B1
Authority
EP
European Patent Office
Prior art keywords
gas
flow direction
channels
channel
installation
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.)
Expired - Lifetime
Application number
EP90917830A
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German (de)
English (en)
Other versions
EP0479937A1 (fr
Inventor
Ake KÄLLSTRAND
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.)
Adtec AB
Original Assignee
Adtec AB
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Filing date
Publication date
Application filed by Adtec AB filed Critical Adtec AB
Publication of EP0479937A1 publication Critical patent/EP0479937A1/fr
Application granted granted Critical
Publication of EP0479937B1 publication Critical patent/EP0479937B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the present invention relates to gas purifying installations operating with reversal of the gas-through-flow direction, and more precisely it concerns an arrangement by means of which polluted gas which on account of the reversal of the gas-flow direction remains untreated, is prevented from reaching the environment.
  • the invention concerns e.g. the type of gas purification installation which is described in SE-A-441 623.
  • the gas to be treated travels through the installation alternately in opposite directions.
  • the change of direction generally is effected with the aid of a reversing valve arranged in a manner ensuring that treated discharge gas and untreated supply gas alternately flow through the valve chambers.
  • a reversing valve arranged in a manner ensuring that treated discharge gas and untreated supply gas alternately flow through the valve chambers.
  • one consequence of this arrangement is that when the gas flow direction is changed, untreated gas will be discharged into the surrounding atmosphere without having passed through the treatment zone of the purifying installation, unless special means are provided to prevent this from happening.
  • the main object of the present invention is to provide an efficient device of simple construction by means of which untreated gases are positively prevented from reaching the atmosphere in connections with reversal of the gas through-flow direction through the purifying installation.
  • the object is achieved in accordance with the invention in that prior to reversal of the direction of the gas, clean air or other clean gas is made to flow to the operative part of the installation in order to temporarily fill the part of the installation which prior to the reversal of the direction of the gas serves as the inlet and after the reversal of the direction of the gas serves as the outlet.
  • a unit in accordance with the invention which is adapted for use in gas purifying installations of the kind operating with reversal of the gas through-flow direction and comprising a double-purpose channel system, which upon operation in one flow direction forms the inlet channel feeding polluted gas into the installation and upon operation in the opposite flow direction forms the outlet channel discharging purified gas therefrom, which unit is mounted within the inlet channel, this unit consisting of an inlet chamber, an outlet chamber and a multi-channel system positioned intermediate the inlet and outlet chambers and comprising at least two channels, whereas in the interior of the inlet chamber is located a valve means which, depending on its position, directs gas entering the inlet channel to one or the other of the two channels.
  • the purifying installation illustrated in the drawings and generally referred to by reference numeral 1 is of a type known per se and described e.g. in SE-A-441 623.
  • the illustrated installation comprises a chamber having two perforated walls 2 defining between them a treatment zone 3, preferebly consisting of sand, wherein heating elements 4 are positioned.
  • the device At its top and its bottom the device comprises collection and through-flow chambers 5 and 6 respectively, to which are connected gas conduits 7 and 8, respectively.
  • the gas conduits 7, 8 meet in a valve housing 9 into which opens a conduit 10 connecting the valve housing with the surrounding atmosphere. Both conduits 7 and 8 carry gas to and from the installation 1, depending on the position in which a valve means 11 is set inside the valve housing 9.
  • gas is heat-treated for combustion of the impurities contained in the gas.
  • additional energy is supplied by the heating elements 4 to assist in elevating the temperature.
  • the gas is forced to pass alternately in opposite directions through the treatment zone, the reversals of direction being effected by means of the valve 9, 11. In the position of the valve illustrated in Fig.
  • Fig. 3 illustrates the valve means in the alternative setting position in which untreated gas flows through the common channel 12, the valve housing 9, the conduit 8 and the collection chamber 6 to pass through the treatment bed 3. Gas treated therein passes further outwards through the collection chamber 5, the conduit 7, the valve housing 9 and it is discharged to the atmosphere through the outlet 10. Accordingly, if polluted gas to be treated is supplied continuously through the channel 12, any such gas that may remain in the regions closest to the valve housing at the time immediately following a reversal of the valve means, i.e.
  • the purpose of the invention is to prevent such discharges of untreated gas and to this end it provides a device generally consisting of an auxiliary unit 13 which is mounted in the common inlet 12 leading to the valve housing 9.
  • the auxiliary device 13 consists of a channel system including an inlet chamber 14, an outlet chamber 15 and a multi-channel system positioned intermediate the inlet and outlet chambers and comprising at least two channels 16 and 17. It goes without saying that the two channels could be in the form of two groups of channels 16 and 17, respectively.
  • a flap valve 18 In the interior of the inlet chamber is located a flap valve 18 which, depending on its position, directs gas entering the common channel 12 to one or the other of the two channel systems 16 or 17.
  • the outlet chamber 15 serves to direct gas discharged from the two channel systems 16, 17 to the common inlet channel 12 leading to the valve housing 9.
  • Pressure-increasing devices, such as fans or similar means may be connected to the intake channels 19, 20.
  • the device functions in the following manner.
  • polluted gas flowing through the channel 12 will pass via the channel system 16, the outlet chamber 15, the valve housing 9, the conduit 7 and the collection chamber 5 up to the treatment zone 3 and from there further via the collection chamber 6, the conduit 8, the valve housing 9 to be discharged into the atmosphere in purified condition through the outlet 10.
  • fresh air is supplied through the air intake 20 into the channel system 17, filling the latter, while polluted gas, previously present in the channel system 17, will be forced into the channel 12 via the outlet chamber 15.
  • valve 11 Upon reversal of the valve 11 to change the flow direction of the gas through the installation 1 also the position of valve 18 is reversed, with the result that, as illustrated in Fig. 2, polluted gas instead will pass through the channel system 17 and into the valve housing via the outlet chamber 15 while the channel system 16 successively filled with fresh air entering through the intake 19 and polluted gas remaining inside the channel system 116 successively will flow into the installation 1 while the fresh air gradually fills the channel system 16.
  • Fig. 3 is illustrated the position when the entire channel system 16 is filled with fresh air entering at a comparatively slow rate.
  • some fresh air will be entrained by the polluted gases into the installation, also after filling of the associated channel system with fresh air, if some further time passes before a change of flow direction takes place.
  • the volume of the channel systems 16, 17 should, however, be sufficient to allow fresh air contained therein to flow through the entire purifying installation 1 before reversal of the valve flap 11 is effected.
  • auxiliary device 13 is in the shape of a channel system and in the aforegoing description reference is made to a channel system but obviously it is possible to arrange the chambers formed by the channels in some other way. Also other types of vessels may be filled alternately with fresh air and polluted gas and alternately be shunted into the regular supply inlet to the purifying installation.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Gas Separation By Absorption (AREA)

Claims (3)

  1. Installation de purification de gaz, de préférence du type à combustion, du genre fonctionnant avec inversion de la direction d'écoulement de gaz et comportant un dispositif de canal à double fonction, ledit dispositif, lorsqu'en fonction dans une direction d'écoulement, constitue le canal d'admission alimentant l'installation en gaz pollué et lorsqu'en fonction dans la direction opposée d'écoulement, constitue le canal d'émission qui en décharge le gaz purifié, caractérisée par un élément (13) monté à l'intérieur du canal d'admission (12), cet élément étant constitué d'une chambre d'admission (14), d'une chambre d'émission (15) et d'un dispositif à canaux multiples positionné entre les chambres d'admission et d'émission et comprenant au moins deux canaux (16,17), alors qu'à l'intérieur de la chambre d'admission (14) se trouve un moyen soupape (18) qui, suivant sa position, dirige le gaz entrant dans le canal d'admission (12) vers l'un ou l'autre des deux canaux (16,17).
  2. Dispositif suivant la revendication 1, caractérisé en ce que le moyen soupape est une soupape à inversion (18) située dans l'extrémité d'admission des canaux parallèles et en ce que des canaux d'arrivée d'air frais (19,20) se trouvent à l'écart des extrémités d'émission des deux canaux (16,17), de préférence dans la région d'entrée desdits deux canaux..
  3. Dispositif suivant la revendication 2, caractérisé en ce qu'il comporte des moyens d'égaliser les pressions dans les canaux d'arrivée d'air frais (19,20) et dans les canaux parallèles (16,17).
EP90917830A 1989-06-28 1990-06-25 Dispositif destines a des installations de purification de gaz, empechant la decharge de gaz non purifie lors de changements du sens d'ecoulement de gaz Expired - Lifetime EP0479937B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE8902328A SE463940B (sv) 1989-06-28 1989-06-28 Anordning vid gasreningsanlaeggningar foer att vid riktningsvaexling foerhindra utslaepp av orenad gas
SE8902328 1989-06-28
PCT/SE1990/000453 WO1991000477A1 (fr) 1989-06-28 1990-06-25 Procede et dispositif destines a des installations de purification de gaz, empêchant la decharge de gaz non purifie lors de changements du sens d'ecoulement de gaz

Publications (2)

Publication Number Publication Date
EP0479937A1 EP0479937A1 (fr) 1992-04-15
EP0479937B1 true EP0479937B1 (fr) 1993-09-01

Family

ID=37309464

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90917830A Expired - Lifetime EP0479937B1 (fr) 1989-06-28 1990-06-25 Dispositif destines a des installations de purification de gaz, empechant la decharge de gaz non purifie lors de changements du sens d'ecoulement de gaz

Country Status (6)

Country Link
EP (1) EP0479937B1 (fr)
AT (1) ATE93953T1 (fr)
AU (1) AU5951390A (fr)
DE (1) DE69003108T2 (fr)
SE (1) SE463940B (fr)
WO (1) WO1991000477A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI91333C (fi) * 1990-07-19 1994-06-10 Nokia Kaapeli Oy Kaapeli
SE9103786L (sv) * 1991-12-19 1993-06-14 Bjoern Heed Gasbehandlingsanlaeggning av s k foerbraenningsvaexlartyp
SE515710C2 (sv) 2000-02-11 2001-10-01 Bjoern Heed Luftskåp vid en regenerativ förbränningsanordning

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1478419A (en) * 1975-01-28 1977-06-29 Air Prod & Chem Reversible heat exchanger or regenerator systems
DE3139153A1 (de) * 1981-10-01 1983-04-14 Linde Ag, 6200 Wiesbaden "verfahren zum umschalten zweier regeneratoren"
SE441623B (sv) * 1984-06-21 1985-10-21 Heed Bjoern Forfarande och anordning for forbrenning och/eller sonderdelning av fororeningar
DK161037C (da) * 1988-10-17 1991-10-28 Haldor Topsoe As Fremgangsmaade og anlaeg til kontinuerligt at rense en oxygenholdig gas for braendbare forureninger

Also Published As

Publication number Publication date
SE8902328D0 (sv) 1989-06-28
DE69003108D1 (de) 1993-10-07
ATE93953T1 (de) 1993-09-15
AU5951390A (en) 1991-01-17
DE69003108T2 (de) 1994-01-27
SE463940B (sv) 1991-02-11
SE8902328L (sv) 1990-12-29
EP0479937A1 (fr) 1992-04-15
WO1991000477A1 (fr) 1991-01-10

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