HK187795A - A method of improving the hg-removing capability of a flue gas cleaning process - Google Patents

A method of improving the hg-removing capability of a flue gas cleaning process Download PDF

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Publication number
HK187795A
HK187795A HK187795A HK187795A HK187795A HK 187795 A HK187795 A HK 187795A HK 187795 A HK187795 A HK 187795A HK 187795 A HK187795 A HK 187795A HK 187795 A HK187795 A HK 187795A
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HK
Hong Kong
Prior art keywords
flue gas
chloride
drying
gas
absorption zone
Prior art date
Application number
HK187795A
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English (en)
French (fr)
Inventor
Stig Felsvang Karsten
Kragh Nielsen Kirsten
Brokner Christiansen Ove
Original Assignee
Niro A/S
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.)
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Publication date
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Application filed by Niro A/S filed Critical Niro A/S
Publication of HK187795A publication Critical patent/HK187795A/en

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    • 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
    • B01D53/02—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 by adsorption, e.g. preparative gas chromatography
    • B01D53/06—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
    • B01D53/10—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 by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds with dispersed adsorbents
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/64—Heavy metals or compounds thereof, e.g. mercury

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

Claims (11)

  1. Verfahren zur Entfernung schädlicher Bestandteile einschliesslich Schwefeldioxyd und Quecksilber aus einem von Kohlenverbrennung stammenden heissen Abgas mit einer Temperatur von 110-170°C und einem niedrigen Chlorid-Inhalt, bei welchem Verfahren eine wässrige Lösung eines basischen Absorptionsmittels in einer Trockenkammer einer Trocknungs-Absorptions-Zone umfassend eine Trockenkammer und einen Partikelsammler sowie einen diese verbindenden Kanal, in feine Tropfen in das heisse Abgas zerstäubt wird, wobei das Wasser dieser Tropfen verdampft und trockene feine Partikeln hinterlässt, und ein Teil der schädlichen Bestandteile des Gases umfassend Schwefeloxyde, Wasserstoffhalogenide und Stickstoffoxyde und Quecksilber durch die Tropfen und die feinen Partikeln gleichzeitig sorbiert wird, wonach das Abgas mit mitgeführten feinen Partikeln zum Partikelsammler geleitet wird, wo Kontakt zwischen den Partikeln und dem Abgas zu einer zusätzlichen Sorption von schädlichen Bestandteilen führt, worin die Menge des der Trocknungs-Absorptions-Zone zugeführten Chlorids auf ein Ausmass erhöht wird, die zur Verbesserung der Hg-Entfernungskapazität des Verfahrens ausreichend ist.
  2. Verfahren nach Anspruch 1, bei welchem die Erhöhung der Chloridmenge in der Trocknungs-Absorptions-Zone durch ein Erhöhen der Chlorid-Konzentration im Abgas in einem oder beiden der folgenden Massnahmen: (a) Zugabe eines Chlorids oder Chlorid-haltigen Materials zur Kohle vor oder unter deren Verbrennung, und (b) Einspritzen von gasförmigem HCl in das Abgas stromaufwärts der Trocknungs-Absorptionszone oder in diese, stattfindet.
  3. Verfahren nach Anspruch 1, bei welchem die Erhöhung der Chloridmenge in der Trocknungs-Absorptions-Zone durch Aufnahme eines Alkalimetall- oder eines Erdalkalimetallsalzes oder dessen Lösung in die wässrige Suspension eines basischen Absorptionsmittels vollendet wird.
  4. Verfahren nach Anspruch 1-3, bei welchem pulverförmige aktive Kohle an einer Stelle stromaufwärts der Trockenkammer, in die Trockenkammer oder stromabwärts davon, aber stromaufwärts des Partikelsammlers in das Abgas dispergiert wird.
  5. Verfahren nach Anspruch 4, nach welchem die aktive Kohle in einer Menge von 1-100 mg/Nm³ Abgas benutzt wird.
  6. Verfahren nach Anspruch 4, bei welchem durch Erhöhung des Chlorid-Inhalts des zu der Trocknungs-Absorptions-Zone geleiteten Gases auf 20-150 ppm und Dispersion von aktiver Kohle in einer Menge von 1-100 mg/Nm³ in das Abgas 90-99% des Hg-Inhalts im Abgas beseitigt wird.
  7. Verfahren nach einem der Ansprüche 1-6, wobei die Erhöhung der Chloridzugabe auf Grundlage des Ergebnisses von Hg-Analysen des den Partikelsammler verlassenden Gases erfolgt.
  8. Verfahren nach einem der Ansprüche 1-6, wobei die Erhöhung der Chloridzugabe vom Chloridinhalt des in die Trocknungs-Absorptions-Zone einströmenden Gases abhängt.
  9. Verfahren nach Anspruch 8, bei welchem der Chlorid-inhalt in Gasanalysen berechnet und/oder auf Basis von Chlorid-Analysen der Kohle durchgeführten Berechnungen geschätzt wird.
  10. Verfahren nach Anspruch 2, bei welchem ein Chlorid-oder Chlor-haltiges Material der Kohle vor oder unter deren Verbrennung in einer Menge zugefügt wird, die zum Erhalt einer totalen Chlorid-Konzentration von mindestens 1 Gew.-ppm im Abgas ausreichend ist.
  11. Verfahren nach einem der vorhergehenden Ansprüche, nach welchem eine totale Chlorid-Konzentration von 20-120 ppm im Abgas erreicht wird.
HK187795A 1991-11-04 1995-12-14 A method of improving the hg-removing capability of a flue gas cleaning process HK187795A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/787,433 US5435980A (en) 1991-11-04 1991-11-04 Method of improving the Hg-removing capability of a flue gas cleaning process
PCT/DK1992/000318 WO1993008902A1 (en) 1991-11-04 1992-11-03 A METHOD OF IMPROVING THE Hg-REMOVING CAPABILITY OF A FLUE GAS CLEANING PROCESS

Publications (1)

Publication Number Publication Date
HK187795A true HK187795A (en) 1995-12-22

Family

ID=25141459

Family Applications (1)

Application Number Title Priority Date Filing Date
HK187795A HK187795A (en) 1991-11-04 1995-12-14 A method of improving the hg-removing capability of a flue gas cleaning process

Country Status (9)

Country Link
US (1) US5435980A (de)
EP (1) EP0613397B1 (de)
AT (1) ATE124632T1 (de)
CA (1) CA2121508C (de)
DE (1) DE69203350T2 (de)
DK (1) DK0613397T3 (de)
FI (1) FI104413B (de)
HK (1) HK187795A (de)
WO (1) WO1993008902A1 (de)

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Also Published As

Publication number Publication date
US5435980A (en) 1995-07-25
FI942058L (fi) 1994-05-04
CA2121508C (en) 2002-04-16
DE69203350T2 (de) 1996-04-11
FI942058A0 (fi) 1994-05-04
ATE124632T1 (de) 1995-07-15
CA2121508A1 (en) 1993-05-13
FI104413B (fi) 2000-01-31
DE69203350D1 (de) 1995-08-10
DK0613397T3 (da) 1995-12-04
WO1993008902A1 (en) 1993-05-13
EP0613397A1 (de) 1994-09-07
EP0613397B1 (de) 1995-07-05

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