DE2735812A1 - Additives recovery from incinerator exhausts - using cooling stage after electrostatic precipitator to condense out and recycle additives - Google Patents

Additives recovery from incinerator exhausts - using cooling stage after electrostatic precipitator to condense out and recycle additives

Info

Publication number
DE2735812A1
DE2735812A1 DE19772735812 DE2735812A DE2735812A1 DE 2735812 A1 DE2735812 A1 DE 2735812A1 DE 19772735812 DE19772735812 DE 19772735812 DE 2735812 A DE2735812 A DE 2735812A DE 2735812 A1 DE2735812 A1 DE 2735812A1
Authority
DE
Germany
Prior art keywords
additives
electrostatic precipitator
recovery
cooling stage
recycle
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Withdrawn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
DE19772735812
Other languages
German (de)
Inventor
Heinrich Gresch
Heinz Hoelter
Heinrich Igelbuescher
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE19752538312 external-priority patent/DE2538312A1/en
Application filed by Individual filed Critical Individual
Priority to DE19772735812 priority Critical patent/DE2735812A1/en
Publication of DE2735812A1 publication Critical patent/DE2735812A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/013—Conditioning by chemical additives, e.g. with SO3
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/006—Layout of treatment plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J15/00—Arrangements of devices for treating smoke or fumes
    • F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
    • F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
    • F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Electrostatic Separation (AREA)
  • Treating Waste Gases (AREA)

Abstract

Additives are recovered from the gas cleaning on the exhaust from waste incinerators by introducing a cooling stage after the filter which is normally an electrostatic precipitator. Additive recovered together with some quantities of wash liquor are reintroducing before the electro-filter. The process is used as part of the gas cleaning system on waste incinerators. The cleaning process uses additives described in DT 2538312. This process recovers these additives, thus reducing the operating cost.

Description

Verfahren zur Rückgewinnung von Additiven bei der vor-Process for the recovery of additives in the pre-

zugsweise Müllverbrennungsabgasreinigung.preferably waste incineration waste gas cleaning.

Beschreibung und Erläuterung zur Zusatzpatentanmeldung Verfahren zur Rückgewinnung von Additiven bei der vorzugsweise Müllverbrennungsabgasreinigung.Description and explanation of the additional patent application procedure for Recovery of additives in the preferably waste incineration waste gas cleaning.

In der Hauptanmeldung wird eine intensivierte Abgasreinigung von Rauchgasen beschrieben, wobei diese Abgase mittels Elektrofilter und Einsatz einer präparierten Waschlösung gereinigt werden.In the main application, an intensified exhaust gas cleaning of flue gases described, these exhaust gases by means of electrostatic precipitators and use of a prepared Wash solution to be cleaned.

Bei sehr heißen Abgasen, z.B. hinter Müllverbrennungsanlagen werden vielfach Vorkühler verwandt.In the case of very hot exhaust gases, e.g. behind waste incineration plants often used pre-coolers.

In diese Vorkühler werden Waschlösungen eingesprüht, wobei die flüssigen Bestandteile verdampfen und die Feststoffe mit den Schadstoffen wie S02, HC1 und Fluor reagieren sollen.Washing solutions are sprayed into this pre-cooler, with the liquid Components evaporate and the solids with the pollutants such as S02, HC1 and Fluorine should react.

Hierbei entstehen in der Regel starke Inkrustierungen und auch eine nicht genügend hohe Absorption.This usually results in strong incrustations and also a insufficient absorption.

Um das zu vermeiden, wurde in der Hauptanmeldung beschrieben, daß man der Waschflüssigkeit Anionen zusetzt, die mit Kalzium wasserlösliche Verbindungen bilden, die bei Anwesenheit von schwefeliger Säure in einem neutralem oder schwach saurem Waschmedium gegen S02-Ionen ausgetauscht werden und im alkalischem Bereich des Waschmediums die wasserlöslichen Verbindungen zurückbilden.To avoid this, it was described in the parent application that anions, the compounds soluble in water with calcium, are added to the washing liquid form, those in the presence of sulphurous acid in a neutral or weakly acidic washing medium can be exchanged for SO2 ions and in alkaline Re-form the water-soluble compounds in the area of the washing medium.

Würde man solche Flüssigkeit in einer geringen Menge bis zur Verdampfung einsprühen, so würden bei hohen Temperaturen, z.B. gewünschte Temperatur um 2800C, die für Elektrofilter-Entstauber noch zweckdienlich ist, auch eine Verdampfung der Anionen der Carbonsäure und/oder Anionen der Halogengruppe, flüchtig werden.One would like such a liquid in a small amount until it evaporates spray, at high temperatures, e.g. desired temperature around 2800C, which is still useful for electrostatic precipitators, including an evaporation of the Anions of the carboxylic acid and / or anions of the halogen group, become volatile.

Der Verlust dieser doch relativ teuren Additive würde das Verfahren unwirtschaftlicher gestalten.Losing these relatively expensive additives would ruin the process make it less economical.

Aus diesem Grunde wird erfindungsgemäß vorgeschlagen, das Verfahren wie folgt durchzuführen.For this reason, the invention proposes the method to be carried out as follows.

In der beiliegenden Skizze ist dargestellt mit 1: ein Verbrennungskessel mit 2: der nachgeschaltete Verdampfungskühler mit 3: der Elektrofilter mit 4: die Rückkühlstrecke oder der Rückkühler für Additive mit 5: das Reingas mit 6: die Rückführung der Additive in den Mischbehälter 7 mit 7: der ischbehälter für Additive und aiaschflüssigkeit mit 8: die Einsprühung in den Bereich der Verdampfungsvorrichtung Durch das Kontaktieren der erfindungsgemäßen Waschflüssigkeit nach P 2538312.4 in den Bereich 8 tritt eine Verdampfung im Verdampfungskühler auf. Erfindungsgemäß wird daher vorgeschlagen zur Rückführung der Additive und einen Teil der eingesprühten Kühl- und Waschflüssigkeitsmenge eines Rückkühlers so anzuordnen, daß die Additive und ein Teil der liaschflüssigkeit dem Waschflüssigkeitsmischbehälter 7 zur neuen Verwendung wieder zugeführt werden können.In the attached sketch is shown with 1: a combustion boiler with 2: the downstream evaporative cooler with 3: the electrostatic precipitator with 4: the Recooling section or the recooler for additives with 5: the clean gas with 6: the return of the additives to the mixing tank 7 with 7: the isch tank for additives and ash liquid with 8: the spray in the area of the evaporation device By contacting the washing liquid according to the invention according to P 2538312.4 in the area 8, an evaporation occurs in the evaporative cooler. According to the invention it is therefore proposed to recycle the additives and some of the injected To arrange the amount of cooling and washing liquid in a recooler so that the additives and a part of the washing liquid to the washing liquid mixing tank 7 for the new Can be used again.

Selbstverständlich ist die Erfindung nicht auf die vorstehend im einzelnen dargestellte Ausbildungsform beschränkt, sondern es sind zahlreiche Abänderungen möglich, ohne jedoch von dem Grundgedanken abzuweichen, hinter dem Gasreinigungsaggregat z.B. Elektrofilter eine Kühleinrichtung zu wählen, die die Rückführung der Additive und einen Teil der Waschflüssigkeit garantiert, so daß das Verfahren sich wirtschaftlicher gestalten läßt.Of course, the invention is not limited to the above in detail The form of training shown is limited, but there are numerous changes possible, but without deviating from the basic idea, behind the gas cleaning unit E.g. electrostatic precipitator to choose a cooling device that recirculates the additives and a part of the washing liquid is guaranteed, making the process more economical can be designed.

PatentanspruchClaim

Claims (1)

Patentanspruch: Verfahren zur Rückgewinnung von Additiven bei der vorzugsweise Müllverbrennungsabgasreinigung dadurch gekennzeichnet, daß hinter dem filterndem Abscheider, vorzugsweise Elektrofilter eine Rückkühlstufe für Additive eingesetzt ist, die die rückgewonnenen Additive und einen Teil der Waschflüssigkeitsmengen wieder dem Reinigungsprozeß vor dem Elektrofilter zuführt.Claim: Process for the recovery of additives in the preferably waste incineration waste gas cleaning characterized in that behind the filtering separator, preferably electrostatic precipitator, a recooling stage for additives is used, the recovered additives and part of the amount of washing liquid returns to the cleaning process upstream of the electrostatic precipitator.
DE19772735812 1975-08-28 1977-08-09 Additives recovery from incinerator exhausts - using cooling stage after electrostatic precipitator to condense out and recycle additives Withdrawn DE2735812A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19772735812 DE2735812A1 (en) 1975-08-28 1977-08-09 Additives recovery from incinerator exhausts - using cooling stage after electrostatic precipitator to condense out and recycle additives

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19752538312 DE2538312A1 (en) 1975-08-28 1975-08-28 Flue gas scrubbing soln. - contg. water and anions forming soluble cpds. with calcium esp. chloride and formate ions
DE19772735812 DE2735812A1 (en) 1975-08-28 1977-08-09 Additives recovery from incinerator exhausts - using cooling stage after electrostatic precipitator to condense out and recycle additives

Publications (1)

Publication Number Publication Date
DE2735812A1 true DE2735812A1 (en) 1979-02-22

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DE19772735812 Withdrawn DE2735812A1 (en) 1975-08-28 1977-08-09 Additives recovery from incinerator exhausts - using cooling stage after electrostatic precipitator to condense out and recycle additives

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DE (1) DE2735812A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907177A1 (en) * 1978-02-24 1979-09-06 Rockwell International Corp PROCESS FOR REMOVING SULFUR OXIDES FROM EXHAUST GASES
DE3248894A1 (en) * 1981-07-16 1983-08-11 Adl Innovation METHOD FOR COMBINING HEAT EXCHANGE AND GAS PURIFICATION, AND DEVICE FOR CARRYING OUT THE METHOD
DE3248567A1 (en) * 1982-12-30 1984-07-05 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for the purification of flue gases, preferably from coal power stations
DE3312978A1 (en) * 1982-12-30 1984-10-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Flue gas purification, preferably for fossil power stations, having two electrostatic precipitators and a flue gas purification plant arranged between the electrostatic precipitators
DE4428168A1 (en) * 1993-08-10 1995-02-16 Babcock & Wilcox Co Dry washer with condensate heat exchanger to improve the cycle efficiency
US6375908B1 (en) * 1997-04-28 2002-04-23 Melania Kaszas-Savos Process and apparatus for recovery of raw materials from wastes residues
US6379639B2 (en) * 1998-08-17 2002-04-30 Jürgen Labuschewski Process for purification of flue gas

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2907177A1 (en) * 1978-02-24 1979-09-06 Rockwell International Corp PROCESS FOR REMOVING SULFUR OXIDES FROM EXHAUST GASES
DE3248894A1 (en) * 1981-07-16 1983-08-11 Adl Innovation METHOD FOR COMBINING HEAT EXCHANGE AND GAS PURIFICATION, AND DEVICE FOR CARRYING OUT THE METHOD
DE3248567A1 (en) * 1982-12-30 1984-07-05 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Process for the purification of flue gases, preferably from coal power stations
DE3312978A1 (en) * 1982-12-30 1984-10-18 Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck Flue gas purification, preferably for fossil power stations, having two electrostatic precipitators and a flue gas purification plant arranged between the electrostatic precipitators
DE4428168A1 (en) * 1993-08-10 1995-02-16 Babcock & Wilcox Co Dry washer with condensate heat exchanger to improve the cycle efficiency
US6375908B1 (en) * 1997-04-28 2002-04-23 Melania Kaszas-Savos Process and apparatus for recovery of raw materials from wastes residues
US6379639B2 (en) * 1998-08-17 2002-04-30 Jürgen Labuschewski Process for purification of flue gas

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