DE3732026A1 - Thermal purification of electrostatic precipitator ash which is polluted with ammonia or ammonium salts - Google Patents

Thermal purification of electrostatic precipitator ash which is polluted with ammonia or ammonium salts

Info

Publication number
DE3732026A1
DE3732026A1 DE19873732026 DE3732026A DE3732026A1 DE 3732026 A1 DE3732026 A1 DE 3732026A1 DE 19873732026 DE19873732026 DE 19873732026 DE 3732026 A DE3732026 A DE 3732026A DE 3732026 A1 DE3732026 A1 DE 3732026A1
Authority
DE
Germany
Prior art keywords
ammonia
ammonium salts
electrostatic precipitator
polluted
precipitator ash
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Withdrawn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
DE19873732026
Other languages
German (de)
Inventor
Heinz Dipl Ing Hoelter
Heinrich Dipl Ing Igelbuescher
Heinrich Ing Grad Gresch
Heribert Dipl Ing Dewert
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
Application filed by Individual filed Critical Individual
Priority to DE19873732026 priority Critical patent/DE3732026A1/en
Publication of DE3732026A1 publication Critical patent/DE3732026A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3483—Regenerating or reactivating by thermal treatment not covered by groups B01J20/3441 - B01J20/3475, e.g. by heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3433—Regenerating or reactivating of sorbents or filter aids other than those covered by B01J20/3408 - B01J20/3425
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2220/00—Aspects relating to sorbent materials
    • B01J2220/40—Aspects relating to the composition of sorbent or filter aid materials
    • B01J2220/48—Sorbents characterised by the starting material used for their preparation
    • B01J2220/4875—Sorbents characterised by the starting material used for their preparation the starting material being a waste, residue or of undefined composition
    • B01J2220/4887—Residues, wastes, e.g. garbage, municipal or industrial sludges, compost, animal manure; fly-ashes

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to purification of electrostatic precipitator ash, which is contaminated by ammonia and sulphur salts thereof, by continuous heating of the precipitator ash in a drum furnace.

Description

Es gibt verschiedene Verfahren, die bei Verbrennungs­ anlagen eingesetzt werden, um unter Verwendung von Ammoniak, Aminen oder Harnstoff NO x im Rauchgas zu reduzieren.There are various methods used in incinerators to reduce NO x in flue gas using ammonia, amines or urea.

Dabei läßt sich nicht verhindern, vor allen Dingen wenn Ammoniak oberhalb der Feuerung eingedüst wird - oder das SCR-Verfahren im Heißteil einer Ver­ brennungsanlage, z. B. Kraftwerk, eingegeben wird und eine hohe NO x -Abscheiderate erreicht werden soll, daß ein NH3-Schlupf (nicht umgewandeltes NH3) in unter­ schiedlicher Höhe entweder als freies Ammoniak oder als Salz (NH4 HSO4/(NH4)2 SO4) auftritt und im Elektrofilter mit der Filterasche abgeschieden wird und die E-Filter­ asche für eine Weiterverwendung unbrauchbar wird.It can not be prevented, especially if ammonia is injected above the furnace - or the SCR process in the hot part of a combustion plant, for. B. power plant, is entered and a high NO x deposition rate is to be achieved that an NH 3 slip (unconverted NH 3 ) at different levels either as free ammonia or as salt (NH 4 HSO 4 / (NH 4 ) 2 SO 4 ) occurs and is separated in the electrostatic filter with the filter ash and the e-filter ash becomes unusable for further use.

Um die so verunreinigte Elektrofilterasche von Ammoniak und dessen Schwefelsalzen zu säubern und dem Markt wieder zuführen zu können, wird erfindunsgemäß vorgeschlagen die E-Filterasche über einen Trommelofen bei 350-500°C zu erhitzen, die Ammonsalze thermisch zu zersetzen und das aus dem Trommelofen entweichende Ammoniak in Wasser oder einer Säure aufzufangen oder der Ver­ brennungsanlage zur NO x -Reduzierung direkt wieder zuzuführen.In order to be able to clean the soiled electrostatic precipitator ash from ammonia and its sulfur salts and to be able to return them to the market, it is proposed according to the invention to heat the e-filter ash over a drum furnace at 350-500 ° C., to thermally decompose the ammonium salts and the escaping from the drum furnace Collect ammonia in water or an acid or feed it directly back to the combustion plant to reduce NO x .

Claims (1)

einigung von mit Ammoniak und dessen Schwefelsalzen verunreinigter E-Filterasche, dadurch gekennzeichnet, daß diese Filterasche über einen Trommelofen bei 350-500°C kontinuierlich erhitzt wird, um die Ammonsalze thermisch zu spalten und das aus dem Trommelofen entweichende Ammoniak in Wasser oder einer Säure aufzufangen oder der Verbrennungsanlage zur NO x -Reduzierung direkt wieder zuzuführen.Agreement of E-filter ash contaminated with ammonia and its sulfur salts, characterized in that this filter ash is continuously heated in a drum furnace at 350-500 ° C in order to thermally split the ammonium salts and to collect the ammonia escaping from the drum furnace in water or an acid or directly to the incinerator for NO x reduction.
DE19873732026 1987-09-23 1987-09-23 Thermal purification of electrostatic precipitator ash which is polluted with ammonia or ammonium salts Withdrawn DE3732026A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873732026 DE3732026A1 (en) 1987-09-23 1987-09-23 Thermal purification of electrostatic precipitator ash which is polluted with ammonia or ammonium salts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873732026 DE3732026A1 (en) 1987-09-23 1987-09-23 Thermal purification of electrostatic precipitator ash which is polluted with ammonia or ammonium salts

Publications (1)

Publication Number Publication Date
DE3732026A1 true DE3732026A1 (en) 1989-04-06

Family

ID=6336678

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873732026 Withdrawn DE3732026A1 (en) 1987-09-23 1987-09-23 Thermal purification of electrostatic precipitator ash which is polluted with ammonia or ammonium salts

Country Status (1)

Country Link
DE (1) DE3732026A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001012268A1 (en) * 1999-08-17 2001-02-22 Wisconsin Electric Power Company Ammonia removal from fly ash
US6790264B2 (en) 2000-03-08 2004-09-14 Isg Resources, Inc. Control of ammonia emission from ammonia laden fly ash in concrete
US7217401B2 (en) 1999-08-17 2007-05-15 Wisconsin Electric Power Company Mercury removal from activated carbon and/or fly ash

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275407A (en) * 1961-08-30 1966-09-27 Zieren Chemiebau Gmbh Dr A Method of recovery of ammonia and sulfur dioxide
US3929977A (en) * 1972-10-02 1975-12-30 Koppers Co Inc Method for the thermal conversion of ammonium sulfate to ammonium bisulfate
DE2553028A1 (en) * 1974-11-29 1976-06-16 Montedison Spa PROCESS FOR THE ABSORPTION OF GAS OR LIQUID AMMONIA IN ACID SOLUTIONS OR SUSPENSIONS
DE3425070A1 (en) * 1984-07-07 1986-01-16 Steag Ag, 4300 Essen Process for the denitration of dust-containing combustion exhaust gases and furnace having an apparatus for carrying out the process
DE3438156A1 (en) * 1984-10-18 1986-04-24 Hugo Petersen Gesellschaft für verfahrenstechnischen Anlagenbau mbH & Co KG, 6200 Wiesbaden Process for thermally regenerating active carbon loaded with impurities
DE2714208C2 (en) * 1976-03-31 1986-06-26 Jgc Corp., Tokio/Tokyo Double cylinder device for regenerating used activated carbon
DE3525770A1 (en) * 1985-07-19 1987-01-22 Philipp Mueller Nachf Eugen Bu Process for the continuous removal and recovery of ammonia from waste waters of flue-gas purification plants
DE3526756A1 (en) * 1985-07-26 1987-01-29 Babcock Anlagen Ag Process for separating off ammonia residues from fly ash and steam generation plant having a treatment vessel for carrying out the process

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3275407A (en) * 1961-08-30 1966-09-27 Zieren Chemiebau Gmbh Dr A Method of recovery of ammonia and sulfur dioxide
US3929977A (en) * 1972-10-02 1975-12-30 Koppers Co Inc Method for the thermal conversion of ammonium sulfate to ammonium bisulfate
DE2553028A1 (en) * 1974-11-29 1976-06-16 Montedison Spa PROCESS FOR THE ABSORPTION OF GAS OR LIQUID AMMONIA IN ACID SOLUTIONS OR SUSPENSIONS
DE2714208C2 (en) * 1976-03-31 1986-06-26 Jgc Corp., Tokio/Tokyo Double cylinder device for regenerating used activated carbon
DE3425070A1 (en) * 1984-07-07 1986-01-16 Steag Ag, 4300 Essen Process for the denitration of dust-containing combustion exhaust gases and furnace having an apparatus for carrying out the process
DE3438156A1 (en) * 1984-10-18 1986-04-24 Hugo Petersen Gesellschaft für verfahrenstechnischen Anlagenbau mbH & Co KG, 6200 Wiesbaden Process for thermally regenerating active carbon loaded with impurities
DE3525770A1 (en) * 1985-07-19 1987-01-22 Philipp Mueller Nachf Eugen Bu Process for the continuous removal and recovery of ammonia from waste waters of flue-gas purification plants
DE3526756A1 (en) * 1985-07-26 1987-01-29 Babcock Anlagen Ag Process for separating off ammonia residues from fly ash and steam generation plant having a treatment vessel for carrying out the process

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
DE-Z: VGB Kraftwerkstechnik 65, H.7, 7.1985, S.683bis 687 *
HOLLEMAN-WIBERG: Lehrbuch d. anorg. Chemie, 40.-46. Aufl., 1958, S. 228-229 *
JP 58 1 89 032 A. In: Patents Abstracts of Japan, C-208, Febr.2, 1984, Vol.8, Nr.24 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001012268A1 (en) * 1999-08-17 2001-02-22 Wisconsin Electric Power Company Ammonia removal from fly ash
US6755901B1 (en) 1999-08-17 2004-06-29 Wisconsin Electric Power Company Ammonia removal from fly ash
US6945179B2 (en) 1999-08-17 2005-09-20 Wisconsin Electric Power Company Ammonia removal from fly ash
US7217401B2 (en) 1999-08-17 2007-05-15 Wisconsin Electric Power Company Mercury removal from activated carbon and/or fly ash
US6790264B2 (en) 2000-03-08 2004-09-14 Isg Resources, Inc. Control of ammonia emission from ammonia laden fly ash in concrete

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