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 systemInfo
- 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- Withdrawn
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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
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)
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)
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)
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 |
-
1986
- 1986-12-16 DE DE19863642838 patent/DE3642838A1/en not_active Withdrawn
Patent Citations (2)
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)
Title |
---|
DE-Z: Chem.-Ing.Techn.57, 1985, Nr.3, S.239-241 * |
Cited By (2)
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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