EP0205841B1 - Mobile thermal after-burning installation for a combustible waste gas mixture - Google Patents

Mobile thermal after-burning installation for a combustible waste gas mixture Download PDF

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Publication number
EP0205841B1
EP0205841B1 EP86106088A EP86106088A EP0205841B1 EP 0205841 B1 EP0205841 B1 EP 0205841B1 EP 86106088 A EP86106088 A EP 86106088A EP 86106088 A EP86106088 A EP 86106088A EP 0205841 B1 EP0205841 B1 EP 0205841B1
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EP
European Patent Office
Prior art keywords
combustion chamber
waste gas
temperature combustion
gas mixture
mixing nozzle
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EP86106088A
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German (de)
French (fr)
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EP0205841A1 (en
Inventor
Wolf-Dieter Klein
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Veba Oel Technologie und Automatisierung GmbH
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Veba Oel Technologie und Automatisierung GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/32—Incineration of waste; Incinerator constructions; Details, accessories or control therefor the waste being subjected to a whirling movement, e.g. cyclonic incinerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
    • F23G5/40—Portable or mobile incinerators
    • 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

Definitions

  • the invention relates to a mobile thermal afterburning system for a combustible exhaust gas mixture of the type referred to in the preamble of claim 1.
  • a method for the joint combustion of different types of fluid fuels in two series-connected combustion chambers under the action of tangentially supplied air flows which are twisted in opposite directions has become known, for example, from SU-PS 1 079 954.
  • a plant for the combustion of combustible exhaust gases is known with a cylindrical housing, with a first combustion chamber arranged therein, into which fuel such as heating oil, natural gas or the like and combustion air are introduced, and with a lengthwise connection to the first combustion chamber second combustion chamber, furthermore with two annular cylindrical jacket spaces between the combustion chambers and the housing, one of which is charged tangentially with combustion air and the other tangentially with the exhaust gases to be burned, and from which the air or the exhaust gases are introduced into the combustion chambers through corresponding openings .
  • waste gases are compulsory at certain intervals, which arise during cleaning work before repairs such as stripping processes in columns, apparatuses and coolers, residual relaxation processes in plant parts and apparatuses, and regeneration processes, e.g. B. in the reprocessing of inactive catalysts.
  • these exhaust gases can be aliphatic or aromatic hydrocarbons, odor-intensive hydrogen sulfide compounds, odor-intensive nitrogen compounds and the like.
  • these exhaust gases can be aliphatic or aromatic hydrocarbons, odor-intensive hydrogen sulfide compounds, odor-intensive nitrogen compounds and the like.
  • Such exhaust gas mixtures contain one or more representatives from the group of aliphatic, saturated or unsaturated, or aromatic hydrocarbons, carbon monoxide, hydrogen, hydrogen sulfide, ammonia in addition to varying amounts of nitrogen, carbon dioxide, oxygen, argon, water vapor and, if appropriate, dust, soot particles or condensed liquid components .
  • the invention is also based on the object of designing a device of the generic type in such a way that the consumption of the additional energy to be used, such as heating oil, natural gas or the like, is kept as low as possible by recovering the heat of combustion and by conditioning the exhaust gases to be used.
  • the additional energy to be used such as heating oil, natural gas or the like
  • aerosol-forming constituents such as e.g. B. contain fine liquid droplets, mist or the like. These accompanying substances must first be converted into the gaseous state before they are converted into a thermal combustion, which leads to an increase in the required dwell time and the need for additional energy. This results in the task of first separating these companions and heating them up separately.
  • the aerosol-forming constituents are water, it is also expedient to separate this before the combustion chamber 4 is acted upon, as a result of which a largely pre-dried exhaust gas mixture reaches the combustion chamber 4.
  • the aerosol-forming constituents for example condensed liquid components, dust or soot particles
  • the aerosol-forming constituents can be separated off and passed into the combustion chamber 2 for heating and subsequent combustion in that scoop-shaped in the shell of the combustion chamber 2 Seen in the downstream direction, concave inflow elements 8 are provided in a specific arrangement distributed over the circumferential surface, which are connected to inflow nozzles 9 leading through the combustion chamber wall into the combustion chamber 2.
  • the exhaust gas contaminated with aerosols (liquid droplets or solids) is fed tangentially to the jacket space of combustion chamber 2.
  • the jacket space is the space between the combustion chamber 2 and an outer cylinder.
  • the exhaust gas moves in a spiral around combustion chamber 2 in the jacket space.
  • the aerosols are therefore driven towards the outer cylinder, depending on the diameter and their floating speed.
  • Separation plates which are referred to as inflow elements 8, are attached at right angles to the flow direction against the spiral flow of the gas. These inflow elements 8 are inclined against the direction of flow and are in several rows one behind the other, so that the gases are forcibly diverted. Aerosols that are carried in the gas stream are thus separated by the inflow elements 8 due to the gas deflection.
  • the inflow elements 8 separated from the exhaust gas mixture 16 by possibly arranged in the jacket space of the combustion chamber 2 in connection with inflow nozzles 9 leading into the combustion chamber 2 are introduced, vaporized and possibly also burned.
  • the remaining exhaust gas mixture which is optionally freed of swirl or other aerosol-forming components, is mixed with combustion air 15 preheated to 150 ° C. and swirled in opposite directions and introduced into the combustion chamber 4.
  • the temperature in the combustion chamber 4 is, for example, 850 ° C.
  • the flue gases 17 leaving the combustion chamber 4 are used for heat recovery by means of heat exchangers 11, 12 and 13 built into the chimney 5.
  • the cold exhaust gas 16 to be burned is brought to 700 ° C. by the flue gas; and the oil combustion air 14 warmed up to 180 ° C.
  • the flue gas cools down to, for example, 230 to 250 ° C.
  • the heat recovery system is designed, for example, as a heat exchanger tower i, which can be designed to be tiltable and at the same time is used as a chimney 5.
  • exhaust gases can be safely mixed with atmospheric oxygen at a high temperature level and fed to the combustion in the combustion chamber 4.
  • the preheated exhaust gas mixture is supplied to the mixing nozzle with a swirl flow through the annular inflow channel 6.
  • the preheated combustion air (additional air) is added through the annular inflow channel 7 with an opposite swirl. This results in intensive mixing and, depending on the speeds of the feed gases, the ignitable exhaust gas / additional air mixture enters the combustion chamber 4 under a high shear gradient.
  • the combustion chambers are expediently provided with a refractory lining 22.
  • the combustion chamber 2 is preferably operated at temperatures between 1200 and 2000 ° C, the combustion chamber 4 preferably at temperatures between 800 and 1400 ° C.
  • FIG. 3 shows a longitudinal section of the combustion chamber 2 with the inflow elements 8 arranged in the jacket space and the inflow nozzles 9 leading into the combustion chamber 2.
  • FIG. 4 the inflow elements 8 arranged above the jacket space with the inlet openings of the inflow nozzles 9 are shown as view “A”.
  • FIG. 5 shows in another view as section ce B "the inflow elements 8 and inflow nozzles 9 guiding the combustion chamber wall.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Incineration Of Waste (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

1. Mobile thermal after-burning installation for a combustible waste gas mixture which possibly contains particles of dust or soot, condensable fractions or condensed liquid fractions, comprising a unit assembly arrangement, consecutive in the longitudinal direction, of burner(s) (1) for auxiliary energy such as fuel oil, natural gas or the like, high-temperature combustion chamber (2), low-temperature combustion chamber (4) with respective annular cylindrical jacket spaces surrounding the combustion chambers, annular gap-shaped inflow duct (6), adjoining the jacket space of the high-temperature combustion chamber (2) on the outflow side, of an annular mixing nozzle (3), which receives the waste gas mixture (16) to be burnt through the inflow duct (6), upwardly deflected chimney (5) and supply means for the auxiliary energy (18), for combustion air (14), for auxiliary air (15) and for the waste gas mixture (16) to be burnt, with heat exchange devices (11, 12, 13) for the preheating of the combustion air, of the auxiliary air and of the waste gas mixture (16) for the heating and combustion by means of support flame(s) generated in burner(s) (1) in the high-temperature combustion chamber (2) and in the low-temperature combustion chamber (4), characterized by the following features : a) the feed pipe (16) for the waste gas mixture leads tangentially on the upstream side into the jacket space of the high-temperature combustion chamber (2) and feeds the waste gas mixture through arcuate vanes to the interposed annular mixing nozzle (3) to generate a spin in the outflow direction, b) the feed pipe (15) for the auxiliary air leads tangentially on the outflow side into the jacket space of the low-temperature combustion chamber (4) and feeds the auxiliary air through arcuate vanes, to generate an opposite spin referred to the spin of the waste gas stream, and a further annular inflow duct (7) to the mixing nozzle (3), c) the mixing nozzle (3), in which the feed flows are united in a shear flow, is arranged peripherally from the low-temperature combustion chamber (4) on the upstream side.

Description

Die Erfindung betrifft eine mobile thermische Nachverbrennungsanlage für ein verbrennbares Abgasgemisch der im Oberbegriff des Patentanspruches 1 bezeichneten Art.The invention relates to a mobile thermal afterburning system for a combustible exhaust gas mixture of the type referred to in the preamble of claim 1.

Ein Verfahren zur gemeinsamen Verbrennung von fluiden Brennstoffen unterschiedlicher Art in zwei hintereinandergeschalteten Brennkammern unter Beaufschlagung mit gegensinnig verdrallten tangential zugeführten Luftströmen ist beispielsweise aus der SU-PS 1 079 954 bekannt geworden.A method for the joint combustion of different types of fluid fuels in two series-connected combustion chambers under the action of tangentially supplied air flows which are twisted in opposite directions has become known, for example, from SU-PS 1 079 954.

Aus der FR-OS 2404173 ist eine Anlage zur Verbrennung verbrennbarer Abgase bekannt mit einem zylindrischen Gehäuse, mit einer darin angeordneten ersten Brennkammer, in die Brennstoff wie Heizöl, Erdgas oder dergleichen und Verbrennungsluft eingeführt werden, und mit einer in Längsrichtung an die erste Brennkammer anschließenden zweiten Brennkammer, ferner mit zwei ringzylinderförmigen Mantelräumen zwischen den Brennkammern und dem Gehäuse, von denen der eine tangential mit Verbrennungsluft und der andere tangential mit den zu verbrennenden Abgasen beaufschlagt wird und aus denen die Luft bzw. die Abgase durch entsprechende Öffnungen in die Brennkammern eingeleitet werden.From FR-OS 2404173 a plant for the combustion of combustible exhaust gases is known with a cylindrical housing, with a first combustion chamber arranged therein, into which fuel such as heating oil, natural gas or the like and combustion air are introduced, and with a lengthwise connection to the first combustion chamber second combustion chamber, furthermore with two annular cylindrical jacket spaces between the combustion chambers and the housing, one of which is charged tangentially with combustion air and the other tangentially with the exhaust gases to be burned, and from which the air or the exhaust gases are introduced into the combustion chambers through corresponding openings .

In den Produktionsanlagen von Raffinerien und petrochemischen Anlagen fallen in gewissen Zeitabständen zwangsweise Abgase an, die entstehen bei Reinigungsarbeiten vor Reparaturen wie Abbeizvorgängen in Kolonnen, Apparaten und Kühlern, Restentspannungsvorgängen bei Anlagenteilen und Apparaten sowie Regenerierprozessen z. B. bei der Wiederaufarbeitung von inaktiv gewordenen Katalysatoren. Als Begleitsubstanzen können diese Abgase aliphatische oder aromatische Kohlenwasserstoffe, geruchsintensive Schwefelwasserstoffverbindungen, geruchsintensive Stickstoffverbindungen u. dgl. enthalten.In the production plants of refineries and petrochemical plants, waste gases are compulsory at certain intervals, which arise during cleaning work before repairs such as stripping processes in columns, apparatuses and coolers, residual relaxation processes in plant parts and apparatuses, and regeneration processes, e.g. B. in the reprocessing of inactive catalysts. As accompanying substances, these exhaust gases can be aliphatic or aromatic hydrocarbons, odor-intensive hydrogen sulfide compounds, odor-intensive nitrogen compounds and the like. Like. included.

Derartige Abgasgemische enthalten einen oder mehrere Vertreter aus der Gruppe aliphatischer, gesättigter oder ungesättigter, oder aromatischer Kohlenwasserstoffe, Kohlenmonoxid, Wasserstoff, Schwefelwasserstoff, Ammoniak neben wechselnden Mengen Stickstoff, Kohlendioxid, Sauerstoff, Argon, Wasserdampf sowie ggf. Staub-, Rußpartikel oder auch kondensierte Flüssigkeitsbestandteile.Such exhaust gas mixtures contain one or more representatives from the group of aliphatic, saturated or unsaturated, or aromatic hydrocarbons, carbon monoxide, hydrogen, hydrogen sulfide, ammonia in addition to varying amounts of nitrogen, carbon dioxide, oxygen, argon, water vapor and, if appropriate, dust, soot particles or condensed liquid components .

Hieraus ergab sich das Bedürfnis für eine mobile thermische Nachverbrennungsanlage, die in Raffinerien oder petrochemischen Betrieben eingesetzt werden kann und mit Hilfe derer anfallende Abgase gefahrlos und kostengünstig umgewandelt werden können. Der Erfindung liegt weiterhin die Aufgabe zugrunde, eine Vorrichtung der gattungsgemäßen Art derart auszubilden, daß durch Rückgewinnung der Verbrennungswärme und durch Konditionierung der einzusetzenden Abgase der Verbrauch der einzusetzenden Zusatzenergie wie Heizöl, Erdgas oder dgl. so gering wie möglich gehalten wird.This resulted in the need for a mobile thermal afterburning system that can be used in refineries or petrochemical plants and with the help of which waste gases can be converted safely and inexpensively. The invention is also based on the object of designing a device of the generic type in such a way that the consumption of the additional energy to be used, such as heating oil, natural gas or the like, is kept as low as possible by recovering the heat of combustion and by conditioning the exhaust gases to be used.

Diese Aufgabe wird gemäß der Erfindung dadurch gelöst, daß die Merkmale a) bis c) des Kennzeichens des Patentanspruches 1 verwirklicht sind.This object is achieved according to the invention in that the features a) to c) of the characterizing part of claim 1 are realized.

In den durch thermische Verbrennung umzuwandelnden Abgasen sind bei den in Betracht kommenden Anwendungen der vorliegenden Vorrichtung häufig noch aerosolbildende Bestandteile wie z. B. feine Flüssigkeitströpfchen, Nebel oder dgl. enthalten. Auch diese Begleitstoffe müssen, bevor sie in einer thermischen Verbrennung umgewandelt werden, zunächst in den gasförmigen Zustand übergeführt werden, was zu einer Erhöhung der erforderlichen Verweilzeit und des Bedarfs an Zusatzenergie führt. Hieraus ergibt sich die Aufgabe, diese Begleiter zunächst abzutrennen und gesondert aufzuheizen.In the exhaust gases to be converted by thermal combustion, aerosol-forming constituents such as e.g. B. contain fine liquid droplets, mist or the like. These accompanying substances must first be converted into the gaseous state before they are converted into a thermal combustion, which leads to an increase in the required dwell time and the need for additional energy. This results in the task of first separating these companions and heating them up separately.

Handelt es sich bei den aerosolbildenden Bestandteilen um Wasser, so ist es ebenfalls zweckmäßig, dieses vor Beaufschlagung der Brennkammer 4 abzutrennen, wodurch ein weitgehend vorgetrocknetes Abgasgemisch in die Brennkammer 4 gelangt.If the aerosol-forming constituents are water, it is also expedient to separate this before the combustion chamber 4 is acted upon, as a result of which a largely pre-dried exhaust gas mixture reaches the combustion chamber 4.

Zur Lösung dieser weiteren Aufgabe können nach einer vorteilhaften Ausgestaltung der Erfindung gemäß Patentanspruch 2 die aerosolbildenden Bestandteile, beispielsweise kondensierte Flüssigkeitsanteile, Staub- oder Rußpartikel dadurch abgetrennt und zwecks Aufheizung und anschließender Verbrennung in die Brennkammer 2 geleitet werden, daß im Mantelraum der Brennkammer 2 schaufelförmige in Abstromrichtung gesehen konkave Anströmelemente 8 in bestimmter Anordnung über die Umfangsfläche verteilt vorgesehen sind, die mit durch die Brennkammerwandung in die Brennkammer 2 führenden Einströmdüsen 9 in Verbindung stehen.To achieve this further object, according to an advantageous embodiment of the invention, the aerosol-forming constituents, for example condensed liquid components, dust or soot particles, can be separated off and passed into the combustion chamber 2 for heating and subsequent combustion in that scoop-shaped in the shell of the combustion chamber 2 Seen in the downstream direction, concave inflow elements 8 are provided in a specific arrangement distributed over the circumferential surface, which are connected to inflow nozzles 9 leading through the combustion chamber wall into the combustion chamber 2.

Das mit Aerosolen (Flüssigkeitströpfchen oder Feststoffe) behaftete Abgas wird tangential dem Mantelraum von Brennkammer 2 zugeführt. Der Mantelraum ist der Raum zwischen Brennkammer 2 und einem Außenzylinder. Das Abgas bewegt sich im Mantelraum spiralenförmig um Brennkammer 2. Die Aerosole werden deshalb, abhängig vom Durchmesser und ihrer Schwebegeschwindigkeit, in Richtung Außenzylinder getrieben. Gegen die spiralförmige Strömung des Gases sind im rechten Winkel zur Strömungsrichtung Abscheidebleche angebracht, die als Anströmelemente 8 bezeichnet sind. Diese Anströmelemente 8 sind gegen die Strömungsrichtung geneigt und stehen in mehreren Reihen hintereinander, so daß die Gase zwangsweise umgelenkt werden. Aerosole, die im Gasstrom mitgetragen werden, werden somit durch die Anströmelemente 8 aufgrund der Gasumlenkung abgeschieden. Diejenigen Aerosolbestandteile, die sich am Außenzylinder aufgrund der Zentrifugalkraft aufkonzentriert haben, werden durch die Anströmelemente vom Außenzylinder « abgestreift », da die Anströmelemente mit dem Außenzylinder bündig abschließen. Zwischen dem Mantelraum und dem Brennkammerraum entsteht ein erhebliches Druckgefälle dadurch, daß ein Druckverlust zwischen Mantelraum und Brennkammerraum aufgrund der Geschwindigkeitsdifferenz auftritt. Dadurch wird an den Anströmelementen 8 eine Strömung vorzugsweise der hier angereicherten Aerosolbestandteile durch die Einströmdüsen 9 in die Brennkammer 2 bewirkt. Durch diese Druckdifferenz erfolgt ein Absaugen der am Anströmelement gesammelten Aerosole, die über die Einströmdüse 9 in die heißen Verbrennungsgase eingemischt werden.The exhaust gas contaminated with aerosols (liquid droplets or solids) is fed tangentially to the jacket space of combustion chamber 2. The jacket space is the space between the combustion chamber 2 and an outer cylinder. The exhaust gas moves in a spiral around combustion chamber 2 in the jacket space. The aerosols are therefore driven towards the outer cylinder, depending on the diameter and their floating speed. Separation plates, which are referred to as inflow elements 8, are attached at right angles to the flow direction against the spiral flow of the gas. These inflow elements 8 are inclined against the direction of flow and are in several rows one behind the other, so that the gases are forcibly diverted. Aerosols that are carried in the gas stream are thus separated by the inflow elements 8 due to the gas deflection. Those aerosol components that have concentrated on the outer cylinder due to the centrifugal force are "stripped" by the inflow elements from the outer cylinder, since the inflow elements are flush with the outer cylinder. Between the jacket space and the Combustion chamber space creates a considerable pressure drop in that a pressure loss occurs between the jacket space and the combustion chamber space due to the speed difference. As a result, a flow, preferably of the aerosol constituents enriched here, is effected at the inflow elements 8 through the inflow nozzles 9 into the combustion chamber 2. This pressure difference causes the aerosols collected at the inflow element to be sucked out and mixed into the hot combustion gases via the inflow nozzle 9.

Die Überführung der Flüssigkeitsteilchen oder der aerosolbildenden Bestandteile in der Abgasströmung aus dem Brennkammer 2 umgebenden Mantelraum in die Brennkammer 2 bzw. die Abtrennung von Wasserbestandteilen wird durch die mit 10 in dem Fließschema der Figur 1 bezeichnete schematisch dargestellte Flüssigkeitsabscheidung bzw. die Druckdifferenz zwischen der Brennkammer und den Anströmelementen 8 mit den Einströmdüsen 9 nach Figur 2 bewirkt. In Brenner (n) 1 wird durch Einsatz von Zusatzenergie nämlich Verbrennung von Heizöl EL oder dgl. mit auf beispielsweise 180°C vorgewärmter Luft 14 heißes Rauchgas 17 erzeugt, welches zur Aufheizung der Abgasbestandteile dient.The transfer of the liquid particles or the aerosol-forming constituents in the exhaust gas flow from the jacket chamber surrounding the combustion chamber 2 into the combustion chamber 2 or the separation of water constituents is achieved by the schematically represented liquid separation or the pressure difference between the combustion chamber and 10 in the flow diagram of FIG the inflow elements 8 with the inflow nozzles 9 according to FIG. 2. In burner (s) 1, by using additional energy, namely combustion of heating oil EL or the like, with hot air 14 preheated to 180 ° C., for example, hot flue gas 17 is generated, which is used to heat the exhaust gas components.

In das heiße Rauchgas 17 in Brennkammer 2 werden die aus dem Abgasgemisch 16 durch ggf. im Mantelraum der Brennkammer 2 angeordnete Anströmelemente 8 in Verbindung mit in Brennkammer 2 führenden Einströmdüsen 9 abgetrennten Flüssigkeitsanteile eingeleitet, verdampft und ggf. mitverbrannt.Into the hot flue gas 17 in the combustion chamber 2, the inflow elements 8 separated from the exhaust gas mixture 16 by possibly arranged in the jacket space of the combustion chamber 2 in connection with inflow nozzles 9 leading into the combustion chamber 2 are introduced, vaporized and possibly also burned.

In der Mischdüse 3 wird das ggf. von Flüssigkeitsanteilen oder sonstigen aerosolbildenden Bestandteilen befreite mit einem Drall beaufschlagte restliche Abgasgemisch mit auf beispielsweise 150°C vorgewärmter und gegensinnig verdrallter Verbrennungsluft 15 vermischt und in die Brennkammer 4 eingeleitet. Die Temperatur in der Brennkammer 4 beträgt beispielsweise 850 °C.In the mixing nozzle 3, the remaining exhaust gas mixture, which is optionally freed of swirl or other aerosol-forming components, is mixed with combustion air 15 preheated to 150 ° C. and swirled in opposite directions and introduced into the combustion chamber 4. The temperature in the combustion chamber 4 is, for example, 850 ° C.

Die die Brennkammer 4 verlassenden Rauchgase 17 dienen zur Wärmerückgewinnung mittels in den Kamin 5 eingebauter Wärmetauscher 11, 12 und 13. In dieser Wärmerückgewinnung wird beispielsweise das zu verbrennende kalte Abgas 16 durch das Rauchgas auf 700 °C; und die Ölverbrennungsluft 14 auf 180°C aufgewärmt. Das Rauchgas kühlt sich dabei auf beispielsweise 230 bis 250 °C ab.The flue gases 17 leaving the combustion chamber 4 are used for heat recovery by means of heat exchangers 11, 12 and 13 built into the chimney 5. In this heat recovery, for example, the cold exhaust gas 16 to be burned is brought to 700 ° C. by the flue gas; and the oil combustion air 14 warmed up to 180 ° C. The flue gas cools down to, for example, 230 to 250 ° C.

Beispielsweise durch Ausstattung dir Anlage mit mehreren Einzelbrennern und durch eine über die Sauerstoffmenge im Rauchgas i gesteuerte Kaskadenregelung der Luftversorgung der Brenner kann sichergestellt werden, daß' ein Restsauerstoffgehalt von weniger als 5 Völ.=% im Rauchgas eingehalten wird.For example, by equipping the system with several individual burners and through a cascade control of the air supply to the burners, which is controlled by the amount of oxygen in the flue gas, it can be ensured that a residual oxygen content of less than 5 vols. = % is maintained in the flue gas.

Das Wärmerückgewinnungssystem ist beispielsweise als Wärmetauscherturm i ausgebildet, der kippbar ausgeführt sein kann und gleichzeitig als Kamin 5 genutzt wird.The heat recovery system is designed, for example, as a heat exchanger tower i, which can be designed to be tiltable and at the same time is used as a chimney 5.

In der Mischdüse 3 können gefahrlos Abgase bei hohem Temperaturniveau mit Luftsauerstoff gemischt und der Verbrennung in Brennkammer 4 zugeführt werden. Durch den ringförmigen Einströmkanal 6 wird der Mischdüse das vorgewärmte Abgasgemisch mit einer Drallströmung zugeführt. Durch den ringförmigen Einströmkanal 7 wird mit gegenläufigem Drall die vorgewärmte Verbrennungsluft (Zusatzluft) zugegeben. Hierdurch erfolgt eine intensive Vermischung und in Abhängigkeit von den Geschwindigkeiten der Einsatzgase gelangt das zündfähige Abgas-Zusatzluft-Gemisch unter einem hohen Schergradienten in die Brennkammer 4. Die Brennkammern sind zweckmäßig mit einer feuerfesten Ausmauerung 22 versehen. Die Brennkammer 2 wird vorzugsweise bei Temperaturen zwischen 1 200 und 2 000 °C betrieben, die Brennkammer 4 vorzugsweise bei Temperaturen zwischen 800 und 1 400 °C.In the mixing nozzle 3, exhaust gases can be safely mixed with atmospheric oxygen at a high temperature level and fed to the combustion in the combustion chamber 4. The preheated exhaust gas mixture is supplied to the mixing nozzle with a swirl flow through the annular inflow channel 6. The preheated combustion air (additional air) is added through the annular inflow channel 7 with an opposite swirl. This results in intensive mixing and, depending on the speeds of the feed gases, the ignitable exhaust gas / additional air mixture enters the combustion chamber 4 under a high shear gradient. The combustion chambers are expediently provided with a refractory lining 22. The combustion chamber 2 is preferably operated at temperatures between 1200 and 2000 ° C, the combustion chamber 4 preferably at temperatures between 800 and 1400 ° C.

In dem Fließschema der Figur 1 ist die Gesamtkonfiguration der vorgeschlagenen mobilen thermischen Nachverbrennungsanlage schematisch dargestellt. Die verwendeten Bezugszeichen sind nachfolgend nochmals zusammengestellt :

  • 1 Brenner
  • 2 Hochtemperaturbrennkammer
  • 3 Mischdüse
  • 4 Niedertemperaturbrennkammer
  • 5 Kamin
  • 10 Flüssigkeitsabscheidung bzw. Abscheidung von Aerosolbestandteilen
  • 11 Wärmetauscher für Abgas
  • 12 Wärmetauscher für Zusatzluft
  • 13 Wärmetauscher für Verbrennungsluft
  • 14 Verbrennungsluft für Zusatzenergie (Heizöl oder Erdgas)
  • 15 Zusatzluft
  • 16 Abgas
  • 17 Rauchgas
  • 18 Zusatzenergie (Heizöl oder Erdgas)
In the flow diagram of Figure 1, the overall configuration of the proposed mobile thermal afterburning system is shown schematically. The reference symbols used are listed again below:
  • 1 burner
  • 2 high temperature combustion chamber
  • 3 mixing nozzle
  • 4 low temperature combustion chamber
  • 5 fireplace
  • 10 Liquid separation or separation of aerosol components
  • 11 heat exchangers for exhaust gas
  • 12 heat exchangers for additional air
  • 13 heat exchangers for combustion air
  • 14 Combustion air for additional energy (heating oil or natural gas)
  • 15 additional air
  • 16 exhaust gas
  • 17 flue gas
  • 18 Additional energy (heating oil or natural gas)

In dem schematisierten Längsschnitt der Figur 2 ist eine thermische Nachverbrennungsanlage wie beschrieben und in den Ansprüchen definiert unter Einzeichnung der Hauptströmungslinien für das zu verbrennende Abgas, für die Zusatzluft sowie das entstandene Rauchgas dargestellt. Die verwendeten Bezugszeichen sind wie folgt nochmals zusammengestellt :

  • 1 Brenner
  • 2 Hochtemperaturbrennkammer
  • 3 Mischdüse
  • 4 Niedertemperaturbrennkammer
  • 5 Kamin
  • 6 Einströmkanal für Abgasgemisch
  • 7 Einströmkanal für Zusatzluft
  • 8 Anströmelemente
  • 9 Einströmdüsen
  • 11 Wärmetauscher für Abgas
  • 12 Wärmetauscher für Zusatzluft
  • 13 Wärmetauscher für Verbrennungsluft
  • 14 Verbrennungsluft
  • 15 Zusatzluft
  • 16 Abgas
  • 17 Rauchgas
  • 18 Zusatzenergie (Heizöl oder Erdgas)
  • 20 Zusatzluftführung
  • 21 Abgaszuführung
  • 22 Ausmauerung
The schematic longitudinal section in FIG. 2 shows a thermal afterburning system as described and defined in the claims, drawing the main flow lines for the exhaust gas to be burned, for the additional air and for the flue gas formed. The reference symbols used are compiled again as follows:
  • 1 burner
  • 2 high temperature combustion chamber
  • 3 mixing nozzle
  • 4 low temperature combustion chamber
  • 5 fireplace
  • 6 Inflow channel for exhaust gas mixture
  • 7 Inflow duct for additional air
  • 8 inflow elements
  • 9 inlet nozzles
  • 11 heat exchangers for exhaust gas
  • 12 heat exchangers for additional air
  • 13 heat exchangers for combustion air
  • 14 combustion air
  • 15 additional air
  • 16 exhaust gas
  • 17 flue gas
  • 18 Additional energy (heating oil or natural gas)
  • 20 Additional air flow
  • 21 exhaust gas supply
  • 22 lining

In der Figur 3 ist ein Längsschnitt der Brennkammer 2 mit den in dem Mantelraum angeordneten Anströmelementen 8 und den in die Brennkammer 2 führenden Einströmdüsen 9 gezeigt.FIG. 3 shows a longitudinal section of the combustion chamber 2 with the inflow elements 8 arranged in the jacket space and the inflow nozzles 9 leading into the combustion chamber 2.

In der Figur 4 sind als Ansicht « A " die über den Mantelraum angeordneten Anströmelemente 8 mit den Eintrittsöffnungen der Einströmdüsen 9 gezeigt.In FIG. 4, the inflow elements 8 arranged above the jacket space with the inlet openings of the inflow nozzles 9 are shown as view “A”.

Figur 5 zeigt in einer anderen Ansicht als Schnitt ce B" die Anströmelemente 8 und die Brennkammerwandung führenden Einströmdüsen 9.FIG. 5 shows in another view as section ce B "the inflow elements 8 and inflow nozzles 9 guiding the combustion chamber wall.

Claims (2)

1. Mobile thermal after-burning installation for a combustible waste gas mixture which possibly contains particles of dust or soot, condensable fractions or condensed liquid fractions, comprising a unit assembly arrangement, consecutive in the longitudinal direction, of burner(s) (1) for auxiliary energy such as fuel oil, natural gas or the like, high-temperature combustion chamber (2), low-temperature combustion chamber (4) with respective annular cylindrical jacket spaces surrounding the combustion chambers, annular gap-shaped inflow duct (6), adjoining the jacket space of the high-temperature combustion chamber (2) on the outflow side, of an annular mixing nozzle (3), which receives the waste gas mixture (16) to be burnt through the inflow duct (6), upwardly deflected chimney (5) and supply means for the auxiliary energy (18), for combustion air (14), for auxiliary air (15) and for the waste gas mixture (16) to be burnt, with heat exchange devices (11, 12, 13) for the preheating of the combustion air, of the auxiliary air and of the waste gas mixture (16) for the heating and combustion by means of support flame(s) generated in burner(s) (1) in the high-temperature combustion chamber (2) and in the low-temperature combustion chamber (4), characterized by the following features :
a) the feed pipe (16) for the waste gas mixture leads tangentially on the upstream side into the jacket space of the high-temperature combustion chamber (2) and feeds the waste gas mixture through arcuate vanes to the interposed annular mixing nozzle (3) to generate a spin in the outflow direction,
b) the feed pipe (15) for the auxiliary air leads tangentially on the outflow side into the jacket space of the low-temperature combustion chamber (4) and feeds the auxiliary air through arcuate vanes, to generate an opposite spin referred to the spin of the waste gas stream, and a further annular inflow duct (7) to the mixing nozzle (3),
c) the mixing nozzle (3), in which the feed flows are united in a shear flow, is arranged peripherally from the low-temperature combustion chamber (4) on the upstream side.
2. After-burning installation according to Claim 1, characterized in that vane-shaped approach flow elements (8), concave considered in the outflow direction: which communicate with inflow nozzles (9) leading through the combustion chamber wall into the high-temperature combustion chamber (2) are provided, distributed in specific arrangement over the circumferential surface, in the jacket space of the high-temperature combustion chamber (2) to separate liquid fractions or other aerosol-forming constituents out of the waste gas mixture (16).
EP86106088A 1985-05-04 1986-05-03 Mobile thermal after-burning installation for a combustible waste gas mixture Expired EP0205841B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86106088T ATE45418T1 (en) 1985-05-04 1986-05-03 MOBILE THERMAL AFTER-COMBUSTION PLANT FOR A COMBUSTIBLE EXHAUST MIXTURE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3516085 1985-05-04
DE19853516085 DE3516085A1 (en) 1985-05-04 1985-05-04 MOBILE THERMAL COMBUSTION PLANT FOR COMBUSTIBLE EXHAUST GAS MIXTURES

Publications (2)

Publication Number Publication Date
EP0205841A1 EP0205841A1 (en) 1986-12-30
EP0205841B1 true EP0205841B1 (en) 1989-08-09

Family

ID=6269848

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86106088A Expired EP0205841B1 (en) 1985-05-04 1986-05-03 Mobile thermal after-burning installation for a combustible waste gas mixture

Country Status (3)

Country Link
EP (1) EP0205841B1 (en)
AT (1) ATE45418T1 (en)
DE (2) DE3516085A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2685450B1 (en) * 1991-12-20 1996-10-04 Gaz De France PROCESS FOR THE HEAT TREATMENT OF ANY GASES AND INSTALLATION COMPRISING THE APPLICATION OF THIS PROCESS.
DE9310892U1 (en) * 1993-07-21 1993-10-14 A E R Abfall-Energie-Rückgewinnungsanlagen GmbH, 25479 Ellerau Afterburning plant with energy recovery
FR2758611B1 (en) * 1997-01-17 1999-04-09 Pillard Chauffage AIR COMBUSTION CHAMBER LOADED WITH COMBUSTIBLE PARTICLES
US6948929B2 (en) 2000-10-02 2005-09-27 Ebara Corporation Combustion type waste gas treatment system
DE102006006661B4 (en) * 2006-02-14 2007-12-27 Eisenmann Anlagenbau Gmbh & Co. Kg Afterburner for a combustion fluid with a burner device for liquid fuel
CN108426242B (en) * 2018-04-17 2023-11-10 上海四方锅炉集团工程成套股份有限公司 Maleic anhydride waste gas incineration process and boiler system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2404173A1 (en) * 1977-09-27 1979-04-20 Rhone Poulenc Ind Two section burner for consuming industrial waste gases - has combustion air admitted through holes in first section and through annulus prior to second, and has vortex inducer in first section
SU1079954A1 (en) * 1982-07-05 1984-03-15 Приморское Ордена "Знак Почета" Производственное Объединение "Бор" Им.50-Летия Ссср Method of simultaneous burning of various types of fuel

Also Published As

Publication number Publication date
EP0205841A1 (en) 1986-12-30
DE3516085C2 (en) 1987-10-29
ATE45418T1 (en) 1989-08-15
DE3516085A1 (en) 1986-11-06
DE3664957D1 (en) 1989-09-14

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