DE3642838A1 - Process and apparatus for the simultaneous separation of SO2/NOx downstream of furnaces and NH3 slip removal by means of a fresh coke filter system - Google Patents

Process and apparatus for the simultaneous separation of SO2/NOx downstream of furnaces and NH3 slip removal by means of a fresh coke filter system

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Publication number
DE3642838A1
DE3642838A1 DE19863642838 DE3642838A DE3642838A1 DE 3642838 A1 DE3642838 A1 DE 3642838A1 DE 19863642838 DE19863642838 DE 19863642838 DE 3642838 A DE3642838 A DE 3642838A DE 3642838 A1 DE3642838 A1 DE 3642838A1
Authority
DE
Germany
Prior art keywords
coke
filter
reactor
removal
slip
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Withdrawn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
DE19863642838
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
Priority claimed from DE19863642179 external-priority patent/DE3642179A1/en
Application filed by Individual filed Critical Individual
Priority to DE19863642838 priority Critical patent/DE3642838A1/en
Publication of DE3642838A1 publication Critical patent/DE3642838A1/en
Withdrawn legal-status Critical Current

Links

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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
    • 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 
    • F23J2219/00—Treatment devices
    • F23J2219/30—Sorption devices using carbon, e.g. coke

Abstract

Process and apparatus for simultaneous SO2/NOx separation downstream of furnaces. The main application P 3642179.0 describes a filter being provided downstream of a brown coal coke reactor for catalytic NOx separation, with the aid of which filter it is possible to effectively separate off NH3 slip gas by adding a portion of acid coke to the gas stream upstream of the filter in a reaction section, this acid coke originating from the reactor for SO2 removal connected upstream of the NOx reactor. In order further improve this process, according to the invention it is proposed that the flue gas (1), after an SO2-removal plant, is fed in whole or in a part-stream, with addition of ammonia (3) to an NOx-removal reactor (2) operating with brown coal coke and, by means of fresh coke (5) which is added to a reaction section (4), the residual SO2 and NH3 slip are removed in the downstream precoat filter (6), some of the coke separated off in the filter (6) being returned in the circulation (7) to the reaction section and the excess coke (8) being conveyed to the power station boiler for combustion. <IMAGE>

Description

In der Patentanmeldung von 9. 12. 1986 (Aktenzeichen noch nicht bekannt) ist beschrieben, daß einem Braunkohle­ koksreaktor zur katalytischen NO x -Abscheidung ein Filter nachgeschaltet ist, mit dessen Hilfe es möglich ist, NH3-Schlupfgas dadurch effektiv abzuscheiden, indem dem Gasstrom vor dem Filter in einer Reaktionsstrecke eine Teilmenge von saurem Koks zugegeben wird, und dieser saure Koks aus dem dem NO x -Reaktor vorgeschalteten Reaktor zur SO2-Entfernung stammt. In the patent application from December 9, 1986 (file number not yet known) it is described that a lignite coke reactor for catalytic NO x separation is followed by a filter, with the aid of which it is possible to effectively separate NH 3 slip gas by removing the A partial amount of acidic coke is added to the gas stream upstream of the filter in a reaction zone, and this acidic coke comes from the reactor upstream of the NO x reactor for SO 2 removal.

Diese Anordnung ist insbesondere dann von Vorteil, wenn im Rauchgas vor dem NO x -Reaktor noch erhebliche SO2-Konzentrationen vorliegen im Bereich von z. B. 0,1 bis 0,4 g/m3 entsprechend den gesetzlichen Forderungen.This arrangement is particularly advantageous if there are still considerable SO 2 concentrations in the flue gas upstream of the NO x reactor in the range of, for. B. 0.1 to 0.4 g / m 3 according to the legal requirements.

Es kommt jedoch häufig vor, daß SO2-Entfernungsanlagen bereits eine niedrige SO2-Restkonzentration von z. B. 0,05 bis 0,1 g/m3 sichern, so daß eine zweistufige Reinigung mittels Braunkohlekoks, d. h. in der ersten Stufe SO2-Entfernung und in der zweiten Stufe NO x - Entfernung, unrentabel ist.However, it often happens that SO 2 removal systems already have a low residual SO 2 concentration of e.g. B. 0.05 to 0.1 g / m 3 , so that a two-stage cleaning by means of brown coal coke, ie in the first stage SO 2 removal and in the second stage NO x removal, is unprofitable.

Es wurde gefunden, daß die SO2-Konzentrationen im Rauchgas nach dem NO x -Reaktor noch bei ca. 0,04 bis 0,1 g/m3 liegen, wodurch die Möglichkeit gegeben ist, in einer Reaktionsstrecke frischen Koks zuzugeben und diesen in einem nachgeschalteten Precoat-Filter abzuscheiden. Auf diese Weise wird gewährleistet, daß das Rest-SO2 adsorbiert wird und der Koks somit den NH3-Schlupf chemisch unter Bildung von Ammoniumsulfat bindet. It has been found that the SO 2 concentrations in the flue gas after the NO x reactor are still approximately 0.04 to 0.1 g / m 3 , which makes it possible to add fresh coke in a reaction zone and to add it in a downstream precoat filter. In this way it is ensured that the residual SO 2 is adsorbed and the coke thus chemically binds the NH 3 slip with the formation of ammonium sulfate.

In der Zeichnung ist dargestellt:The drawing shows:

mit (1) das Rauchgas;
mit (2) NO x -Entfernungsreaktor;
mit (3) Zusatz von Ammoniak;
mit (4) eine Reaktionsstrecke;
mit (5) Frischkoks;
mit (6) der nachgeschaltete Precoat-Filter;
mit (7) der Kreislauf;
mit (8) der überschüssige Koks.with ( 1 ) the flue gas;
with ( 2 ) NO x removal reactor;
with ( 3 ) addition of ammonia;
with ( 4 ) a reaction path;
with ( 5 ) fresh coke;
with ( 6 ) the downstream precoat filter;
with ( 7 ) the cycle;
with ( 8 ) the excess coke.

Claims (2)

1. Verfahren und Vorrichtung zur Abscheidung von SO2, NO x und NH3-Schlupfgas aus Rauchgasen, dadurch ge­ kennzeichnet, daß das Rauchgas (1) nach einer SO2- Entfernungsanlage insgesamt oder im Teilstrom einem mit Braunkohlenkoks arbeitenden NO x -Entfernungs­ reaktor (2) unter Zusatz von Ammoniak (3) zugeführt wird und mittels Frischkoks (5), der einer Reaktions­ strecke (4) zudosiert wird, im nachgeschalteten Precoat-Filter (6) das Rest-SO2 und der NH3-Schlupf entfernt werden, wobei ein Teil des im Filter (6) abgeschiedenen Kokses im Kreislauf (7) zur Reaktions­ strecke zurückgeführt und der überschüssige Koks (8) zum Kraftwerkskessel zur Verbrennung gefördert wird.1. The method and apparatus for the separation of SO 2 , NO x and NH 3 slip gas from flue gases, characterized in that the flue gas ( 1 ) after a SO 2 removal system as a whole or in partial flow a reactor with lignite coke NO x removal ( 2 ) with the addition of ammonia ( 3 ) and fresh coke ( 5 ), which is added to a reaction section ( 4 ), in the downstream precoat filter ( 6 ) the residual SO 2 and the NH 3 slip are removed , wherein a part of the coke deposited in the filter ( 6 ) in the circuit ( 7 ) is returned to the reaction section and the excess coke ( 8 ) is conveyed to the power plant boiler for combustion. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Reaktionsstrecke (4) zusätzliches gasförmiges SO2 (9) zudosiert wird, um den erforderlichen Säuregrad des Kokses einzustellen, der für die Abscheidung des NH3- Schlupfes erforderlich ist.2. The method according to claim 1, characterized in that the reaction zone ( 4 ) additional gaseous SO 2 ( 9 ) is metered in to set the required acidity of the coke, which is required for the separation of the NH 3 slip.
DE19863642838 1986-12-10 1986-12-16 Process and apparatus for the simultaneous separation of SO2/NOx downstream of furnaces and NH3 slip removal by means of a fresh coke filter system Withdrawn DE3642838A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19863642838 DE3642838A1 (en) 1986-12-10 1986-12-16 Process and apparatus for the simultaneous separation of SO2/NOx downstream of furnaces and NH3 slip removal by means of a fresh coke filter system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863642179 DE3642179A1 (en) 1986-12-10 1986-12-10 Process and apparatus for simultaneous SO2 and NOx separation downstream of combustion plants having a coke-precoat filter system
DE19863642838 DE3642838A1 (en) 1986-12-10 1986-12-16 Process and apparatus for the simultaneous separation of SO2/NOx downstream of furnaces and NH3 slip removal by means of a fresh coke filter system

Publications (1)

Publication Number Publication Date
DE3642838A1 true DE3642838A1 (en) 1988-09-01

Family

ID=25850192

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19863642838 Withdrawn DE3642838A1 (en) 1986-12-10 1986-12-16 Process and apparatus for the simultaneous separation of SO2/NOx downstream of furnaces and NH3 slip removal by means of a fresh coke filter system

Country Status (1)

Country Link
DE (1) DE3642838A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396655B (en) * 1992-03-26 1993-11-25 Oeko Wien Umweltschutzprojekte Method for cleaning flue gases
CN113289475A (en) * 2021-05-13 2021-08-24 天津中材工程研究中心有限公司 Method for reducing ammonia escape after SNCR or SCR denitration

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232543A1 (en) * 1981-09-10 1983-06-30 Mitsui Mining Co., Ltd., Tokyo METHOD FOR REMOVING SULFUR AND NITROGEN OXIDS FROM AN EXHAUST GAS
DE3443686A1 (en) * 1984-11-30 1986-06-05 VGU Dr. Volker Grumbrecht GmbH, 5270 Gummersbach Process for the elimination of nitrogen oxides and sulphur oxides from gases

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3232543A1 (en) * 1981-09-10 1983-06-30 Mitsui Mining Co., Ltd., Tokyo METHOD FOR REMOVING SULFUR AND NITROGEN OXIDS FROM AN EXHAUST GAS
DE3443686A1 (en) * 1984-11-30 1986-06-05 VGU Dr. Volker Grumbrecht GmbH, 5270 Gummersbach Process for the elimination of nitrogen oxides and sulphur oxides from gases

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE-Z: Chem.-Ing.Techn.57, 1985, Nr.3, S.239-241 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT396655B (en) * 1992-03-26 1993-11-25 Oeko Wien Umweltschutzprojekte Method for cleaning flue gases
CN113289475A (en) * 2021-05-13 2021-08-24 天津中材工程研究中心有限公司 Method for reducing ammonia escape after SNCR or SCR denitration

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