EP0042331B1 - Procédé de traitement d'effluents aqueux contenant des substances organiques et des sels minéraux - Google Patents

Procédé de traitement d'effluents aqueux contenant des substances organiques et des sels minéraux Download PDF

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Publication number
EP0042331B1
EP0042331B1 EP81400925A EP81400925A EP0042331B1 EP 0042331 B1 EP0042331 B1 EP 0042331B1 EP 81400925 A EP81400925 A EP 81400925A EP 81400925 A EP81400925 A EP 81400925A EP 0042331 B1 EP0042331 B1 EP 0042331B1
Authority
EP
European Patent Office
Prior art keywords
furnace
radius
burners
vertical
burner
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
Application number
EP81400925A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0042331A1 (fr
Inventor
Ferenc Szilagyi
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.)
Rhone Poulenc Sante SA
Original Assignee
Rhone Poulenc Sante SA
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 Rhone Poulenc Sante SA filed Critical Rhone Poulenc Sante SA
Priority to AT81400925T priority Critical patent/ATE6385T1/de
Publication of EP0042331A1 publication Critical patent/EP0042331A1/fr
Application granted granted Critical
Publication of EP0042331B1 publication Critical patent/EP0042331B1/fr
Expired 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
    • F23G7/001—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for sludges or waste products from water treatment installations
    • 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
    • F23G7/008—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals for liquid waste

Definitions

  • the present invention relates to a process for the treatment of aqueous effluents containing a solution of organic materials and optionally mineral salts with a view to eliminating the organic substances and optionally recovering the mineral salts of a sufficient quality to allow the recovery and the marketing.
  • the invention relates to a process for treating aqueous effluents containing a high level of organic matter (of the order of 10%) and of mineral salts (generally between 15 and 30%).
  • Incinerator ovens of this type do not always function satisfactorily and the salts recovered are greyish and not marketable. This poor efficiency is due to the fact that, taking into account the design of the oven, the burning temperature cannot be increased without risk of blockage.
  • a temperature in the region of 850 ° C. necessary for the destruction of almost all of the organic materials, cannot be reached because at this temperature , the salt melts and a kind of meringue is formed on the wall which, gradually accumulating, leads to plugging of the oven.
  • incinerator In another type of incinerator, as described for example in English patent 950345, there are two combustion chambers separated by an orifice.
  • the organic matter contained in an oxidoresistant liquid is eliminated by oxidation according to a process which is carried out in two stages carried out in two well-defined zones of the incinerator.
  • the first zone there is an evaporation of the carrier liquid and a partial oxidation of organic matter which is produced by combustion of a fuel in the presence of an excess of oxygen-containing gas, the tangential orientation of the burners creating a current which directs the residual particles which are directed through the combustion gases, in the vicinity of the wall and which are projected, under the influence of the centrifugal force towards the lower end of the first zone.
  • the mixture of combustion gas and residual particles burns completely and uniformly in the second combustion chamber.
  • Such a device is not adaptable to an effluent containing, in addition to residual organic substances, dissolved mineral salts.
  • the end of the central injector must be located in such a way that the spray jet falls directly into the flame; its position in relation to the burners is therefore defined by the spray angle.
  • the effluent undergoes combustion in the zone delimited by the end of the injector and of the burners, then it obligatorily crosses the flame which constitutes an overheated zone in which the combustion is perfect.
  • the turbulence created pushes the combustion products towards the center of the oven thus avoiding the annoying deposit of salt on the wall.
  • the combustion temperature can be significantly higher than the salt melting temperature.
  • a vacuum is created inside the oven, the evacuation orifice being located in the lower part of the oven.
  • the injector bringing the aqueous effluent to the burner can consist of two concentric tubes.
  • the aqueous effluent circulates in the central tube and in the external annular tube circulates air possibly compressed: the effluent is thus pulverized by the orifice of the injector.
  • the burners located in the upper part of the furnace towards the periphery are of the conventional type and they can be powered by liquid or gaseous fuels. Generally three burners, arranged in a star, at 120 °, and oriented towards the base of the oven, are used.
  • An incinerator used for the implementation of the present invention is particularly advantageous for burning aqueous effluents containing organic substances whose thermal stability is high and more particularly aqueous effluents from the preparation of methionine.
  • the mother liquors from the production of methionine contain on average 20% by weight of sodium sulfate and 10% by weight of organic matter.
  • the ignition temperature is close to 700 ° C. but the optimal combustion temperature is situated in the vicinity of 900 ° C., a higher temperature does not bring a significant improvement in the desired result.
  • the aqueous effluent must be sprayed, possibly under pressure (for example 10 bars), in the presence of an excess of air close to or greater than 30%.
  • the residence time in the incinerator defined by the ratio of the volume of the combustion zone to the air flow rate is close to 3 seconds, a longer residence time not bringing a significant improvement in the result and a time shorter stay, close to 1.5 seconds, leading to insufficient quality salt.
  • the cooling of the fumes is ensured by the water vapor obtained and it is improved by the addition of air cooling in order to further decrease the level of unburned organic substances.
  • an incinerator according to the present invention may have 3 to 4 m in diameter for a height of between 10 and 15 m. Equipped with 3 crown burners with a total heating capacity of 10,000 therms / h, at 120 ° from each other, oriented in such a way that the axis of a burner, the end of which is located at a distance of the axis of the furnace close to a third of its diameter, is directed towards the projection of the end of the neighboring burner on a plane, perpendicular to the axis of the furnace, located at a distance from the end of the burners approximately double the diameter of the furnace, supplied with liquid or gaseous fuel, the aqueous effluent being sprayed into the flame at an angle close to 90 °, such an incinerator makes it possible to burn 3 to 6 tonnes per hour of aqueous effluents.
  • the present invention also relates to an incinerator oven for implementing the process for treating aqueous effluents as described above.
  • FIG. 1 gives the diagrams of an incinerator oven according to the present invention.
  • the points A, B, C represent the orifices of the burners and the points A ', B', C 'represent the projections of the orifices of the burners on a plane perpendicular to the axis of the oven of diameter D.
  • the point of impact of the axis of the burner A is point B ', that of B the point C' and that of C the point A '.
  • 1 represents the injector
  • 2 represents the burners
  • 3 the refractory material constituting the wall of the incinerator.
  • 4 shows the smoke and salt discharge opening.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)
  • Gasification And Melting Of Waste (AREA)
  • Removal Of Specific Substances (AREA)
  • Physical Water Treatments (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)
  • Processing Of Solid Wastes (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Incineration Of Waste (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP81400925A 1980-06-13 1981-06-11 Procédé de traitement d'effluents aqueux contenant des substances organiques et des sels minéraux Expired EP0042331B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81400925T ATE6385T1 (de) 1980-06-13 1981-06-11 Verfahren zum behandeln von organische substanzen und mineralsalze enthaltenden abwaessern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8013165A FR2484609A1 (fr) 1980-06-13 1980-06-13 Procede de traitement d'effluents aqueux contenant des substances organiques et des sels mineraux
FR8013165 1980-06-13

Publications (2)

Publication Number Publication Date
EP0042331A1 EP0042331A1 (fr) 1981-12-23
EP0042331B1 true EP0042331B1 (fr) 1984-02-22

Family

ID=9243066

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81400925A Expired EP0042331B1 (fr) 1980-06-13 1981-06-11 Procédé de traitement d'effluents aqueux contenant des substances organiques et des sels minéraux

Country Status (16)

Country Link
US (1) US4425856A (enrdf_load_stackoverflow)
EP (1) EP0042331B1 (enrdf_load_stackoverflow)
JP (1) JPS5727190A (enrdf_load_stackoverflow)
AT (1) ATE6385T1 (enrdf_load_stackoverflow)
AU (1) AU528493B2 (enrdf_load_stackoverflow)
BR (1) BR8103753A (enrdf_load_stackoverflow)
CA (1) CA1173300A (enrdf_load_stackoverflow)
DE (1) DE3162364D1 (enrdf_load_stackoverflow)
DK (1) DK258781A (enrdf_load_stackoverflow)
ES (1) ES503005A0 (enrdf_load_stackoverflow)
FI (1) FI811836L (enrdf_load_stackoverflow)
FR (1) FR2484609A1 (enrdf_load_stackoverflow)
IE (1) IE51231B1 (enrdf_load_stackoverflow)
NO (1) NO811996L (enrdf_load_stackoverflow)
PT (1) PT73183B (enrdf_load_stackoverflow)
ZA (1) ZA813949B (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4668435A (en) * 1982-12-20 1987-05-26 Rockwell International Corporation Thermal conversion of wastes
US4940519A (en) * 1988-06-27 1990-07-10 Dames Robert G Detoxification apparatus and method for toxic waste using laser energy and electrolysis
US5126020A (en) * 1988-06-27 1992-06-30 Dames Robert G Detoxification apparatus and method for toxic waste using an energy beam and electrolysis
FR2698156B1 (fr) * 1992-11-16 1995-01-27 Rhone Poulenc Chimie Procédé de traitement thermique d'un effluent comprenant des matières organiques polluantes ou un composé inorganique.
US5484279A (en) * 1993-03-22 1996-01-16 Emcon, Inc. Method and apparatus for disposal of landfill gas condensate
BE1008206A3 (fr) * 1993-11-05 1996-02-13 Heurbel S A Perfectionnements aux bruleurs du type oxy-fuel.
US5641412A (en) * 1995-10-16 1997-06-24 Guy; Christophe Free radical oxidation process and installation for treating liquid effluents contaminated by organic substances
US5948373A (en) * 1995-10-16 1999-09-07 Corporation De L'ecole Polytechnique Free radical oxidation installation for treating liquid effluents contaminated by organic substances
JP3807855B2 (ja) * 1998-11-02 2006-08-09 ユニ・チャーム株式会社 吸収性物品
JP2004351320A (ja) * 2003-05-29 2004-12-16 Sumitomo Chem Co Ltd 排水処理プロセス
US7901204B2 (en) * 2006-01-24 2011-03-08 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
US7909601B2 (en) * 2006-01-24 2011-03-22 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner
US8075305B2 (en) * 2006-01-24 2011-12-13 Exxonmobil Chemical Patents Inc. Dual fuel gas-liquid burner

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1401871A1 (de) * 1960-11-04 1969-01-30 Basf Ag Verfahren zur Oxydation von Stoffen,die in einer oxydationsbestaendigen Fluessigkeit suspendiert oder geloest sind
DE2223631A1 (de) 1972-05-15 1973-11-29 Polyma Maschinenbau Dr Appelha Verbrennungsofen fuer fluessige brennstoffe
US3799074A (en) * 1972-10-26 1974-03-26 Lucas Furnace Dev Ltd Furnaces for burning sewage and like residues
US3822653A (en) 1973-01-08 1974-07-09 S Ghelfi Incinerating furnace for fluid and sludged refuse
US3861330A (en) * 1974-03-13 1975-01-21 Trane Co Incinerator for aqueous waste material
FR2283096A1 (fr) * 1974-08-28 1976-03-26 Ok Bjuro Procede de neutralisation a la flamme d'eaux residuaires contenant des impuretes organiques et minerales a haut point de fusion, et reacteur pour sa mise en oeuvre
GB2017281B (en) * 1978-03-23 1982-07-21 Asahi Engineering Method and apparatus for treating water solution of waste material containing salt having smelt-water explosion characteristics
US4206711A (en) * 1978-10-04 1980-06-10 Angelo J. Noce Method and apparatus for processing waste fluid
US4291634A (en) 1980-05-29 1981-09-29 Union Carbide Corporation Solid refuse disposal apparatus

Also Published As

Publication number Publication date
ES8204126A1 (es) 1982-04-01
PT73183B (fr) 1982-07-01
IE51231B1 (en) 1986-11-12
IE811299L (en) 1981-12-13
US4425856A (en) 1984-01-17
JPS5727190A (en) 1982-02-13
ZA813949B (en) 1982-06-30
EP0042331A1 (fr) 1981-12-23
DE3162364D1 (en) 1984-03-29
PT73183A (fr) 1981-07-01
AU7147281A (en) 1981-12-17
CA1173300A (fr) 1984-08-28
FR2484609A1 (fr) 1981-12-18
JPH0140670B2 (enrdf_load_stackoverflow) 1989-08-30
BR8103753A (pt) 1981-10-20
DK258781A (da) 1981-12-14
NO811996L (no) 1981-12-14
FI811836A7 (fi) 1981-12-14
AU528493B2 (en) 1983-04-28
ES503005A0 (es) 1982-04-01
FI811836L (fi) 1981-12-14
ATE6385T1 (de) 1984-03-15
FR2484609B1 (enrdf_load_stackoverflow) 1984-12-21

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