DE3524608A1 - Process for controlling the SO2 circulation for simultaneously separating out SO2 and NOx and laughing gas - Google Patents

Process for controlling the SO2 circulation for simultaneously separating out SO2 and NOx and laughing gas

Info

Publication number
DE3524608A1
DE3524608A1 DE19853524608 DE3524608A DE3524608A1 DE 3524608 A1 DE3524608 A1 DE 3524608A1 DE 19853524608 DE19853524608 DE 19853524608 DE 3524608 A DE3524608 A DE 3524608A DE 3524608 A1 DE3524608 A1 DE 3524608A1
Authority
DE
Germany
Prior art keywords
nox
separating out
controlling
circulation
laughing gas
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.)
Granted
Application number
DE19853524608
Other languages
German (de)
Other versions
DE3524608C2 (en
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 DE19853524608 priority Critical patent/DE3524608A1/en
Priority to DE19853525776 priority patent/DE3525776A1/en
Publication of DE3524608A1 publication Critical patent/DE3524608A1/en
Application granted granted Critical
Publication of DE3524608C2 publication Critical patent/DE3524608C2/de
Granted legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/48—Sulfur dioxide; Sulfurous acid
    • C01B17/50—Preparation of sulfur dioxide
    • 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
    • B01D53/60—Simultaneously removing sulfur oxides and nitrogen oxides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Landscapes

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

Abstract

It is known that the ratio of SO2 to NOx must be regulated stoichiometrically in order to achieve the largest possible degree of efficiency in the simultaneous separating out of SO2 and NOx. In order to be able to maintain the favourable range even in the case of an unfavourable ratio of SO2 to NOx, for example in the case of too low an SO2 content, according to the invention the addition of CaSO3 + CaSO4 . 2H2O, arising in the scrubbing process, into the combustion chamber and/or by addition to the fuel is proposed.

Description

Es ist bekannt, daß das Verhältnis von SO2 zu NOx stöchiometrisch geregelt sein muß, um den größtmöglichen Wirkungsgrad bei der simultanen Abscheidung von SO2 und NOx zu erzielen.It is known that the ratio of SO 2 to NO x must be stoichiometrically regulated in order to achieve the greatest possible efficiency in the simultaneous separation of SO 2 and NO x .

Bei Schmelzkammerkesseln ist das Verhältnis von SO2 zu NOx in der Regel ungünstig für den SO2-Wert, d. h. der SO2-Gehalt ist zu gering.In melting chamber boilers, the ratio of SO 2 to NO x is generally unfavorable for the SO 2 value, ie the SO 2 content is too low.

Bisher mußte SO2-Reichgas bzw. Pyrosulfit dem Prozeß zugeführt werden.So far, SO 2 rich gas or pyrosulfite had to be fed into the process.

Um keine wesentlichen zusätzlichen Kosten durch Zugabe von SO2-Reichgas und Pyrosulfit notwendig zu machen, wird erfindungsgemäß vorgeschlagen, das aus dem Waschprozeß anfallende Rückstandsprodukt CaSO3 + CaSO4 · 2H2O dem Feuerungsraum, vorzugsweise dem Brennstoff, z. B. Kohle, beizumischen.To any significant additional costs due to the addition of SO 2 -rich and to make pyrosulfite necessary it is proposed according to the invention, the resulting product from the washing process residue CaSO 3 + CaSO 4 .2H 2 O the furnace chamber, preferably the fuel z. B. coal to mix.

Hierdurch wird SO2 bei der thermischen Zersetzung des Zugegebenen freigesetzt, so daß durch die dosierte Zugabe von CaSO3 + CaSO4 · 2H2O das Verhältnis von SO2 zu NOx im Rohgasstrom und somit prozeßrelevant genau gesteuert werden kann, ohne daß externes Sulfit, wie z. B. Pyrosulfit oder Natriumsulfit oder SO2-Reichgas bzw. elementarer Schwefel oder andere externe, stark schwefelhaltige Verbindungen, die am Verbrennungsprozeß teilnehmen und SO2 erzeugen, zugeführt werden müssen.As a result, SO 2 is released during the thermal decomposition of the added material, so that the metered addition of CaSO 3 + CaSO 4 .2H 2 O enables the ratio of SO 2 to NO x in the raw gas stream and thus process-related to be controlled precisely, without external sulfite , such as B. pyrosulfite or sodium sulfite or SO 2 rich gas or elemental sulfur or other external, highly sulfur-containing compounds that participate in the combustion process and generate SO 2 must be supplied.

Claims (1)

Verfahren zur Steuerung des SO2-Kreislaufes für die simultane SO2- und NOx-Abscheidung gekennzeichnet durch die Zugabe von aus dem Waschprozeß anfallenden CaSO3 + CaSO4 · 2H2O in den Verbrennungsraum und/oder durch Zugabe zum Brennstoff.Process for controlling the SO 2 cycle for simultaneous SO 2 and NO x separation characterized by the addition of CaSO 3 + CaSO 4 .2H 2 O obtained from the washing process into the combustion chamber and / or by addition to the fuel.
DE19853524608 1985-07-10 1985-07-10 Process for controlling the SO2 circulation for simultaneously separating out SO2 and NOx and laughing gas Granted DE3524608A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19853524608 DE3524608A1 (en) 1985-07-10 1985-07-10 Process for controlling the SO2 circulation for simultaneously separating out SO2 and NOx and laughing gas
DE19853525776 DE3525776A1 (en) 1985-07-10 1985-07-19 Process for controlling the SO2 circulation for simultaneous separating off of SO2 and NOx and laughing gas (N2O) in a process for obtaining SO2-rich gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19853524608 DE3524608A1 (en) 1985-07-10 1985-07-10 Process for controlling the SO2 circulation for simultaneously separating out SO2 and NOx and laughing gas

Publications (2)

Publication Number Publication Date
DE3524608A1 true DE3524608A1 (en) 1987-01-22
DE3524608C2 DE3524608C2 (en) 1988-07-14

Family

ID=6275402

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19853524608 Granted DE3524608A1 (en) 1985-07-10 1985-07-10 Process for controlling the SO2 circulation for simultaneously separating out SO2 and NOx and laughing gas

Country Status (1)

Country Link
DE (1) DE3524608A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460231A1 (en) * 1973-12-27 1975-07-03 Chisso Eng Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM INDUSTRIAL EXHAUST GASES AND SUITABLE AQUATIC TREATMENT SOLUTIONS
DE2554584A1 (en) * 1974-12-28 1976-07-01 Chisso Corp METHOD OF REGENERATING AN ABSORBENT SOLUTION THAT HAS BEEN USED TO CLEAN EXHAUST GAS
DE2811181A1 (en) * 1978-03-15 1979-09-20 Hoechst Ag PROCESS FOR THE MANUFACTURING OF NITROGEN MONOXIDE

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2460231A1 (en) * 1973-12-27 1975-07-03 Chisso Eng Co Ltd PROCESS FOR THE REMOVAL OF NITROGEN OXIDES FROM INDUSTRIAL EXHAUST GASES AND SUITABLE AQUATIC TREATMENT SOLUTIONS
DE2554584A1 (en) * 1974-12-28 1976-07-01 Chisso Corp METHOD OF REGENERATING AN ABSORBENT SOLUTION THAT HAS BEEN USED TO CLEAN EXHAUST GAS
DE2811181A1 (en) * 1978-03-15 1979-09-20 Hoechst Ag PROCESS FOR THE MANUFACTURING OF NITROGEN MONOXIDE

Also Published As

Publication number Publication date
DE3524608C2 (en) 1988-07-14

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