EP0207107B1 - Verfahren zur wiederaufheizung nassgereinigter rauchgase - Google Patents

Verfahren zur wiederaufheizung nassgereinigter rauchgase Download PDF

Info

Publication number
EP0207107B1
EP0207107B1 EP86900061A EP86900061A EP0207107B1 EP 0207107 B1 EP0207107 B1 EP 0207107B1 EP 86900061 A EP86900061 A EP 86900061A EP 86900061 A EP86900061 A EP 86900061A EP 0207107 B1 EP0207107 B1 EP 0207107B1
Authority
EP
European Patent Office
Prior art keywords
flue gases
gases
purified
fluidised
furnace
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.)
Expired
Application number
EP86900061A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0207107A1 (de
Inventor
Werner Lehnert
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.)
Saarbergwerke AG
Original Assignee
Saarbergwerke AG
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 Saarbergwerke AG filed Critical Saarbergwerke AG
Priority to AT86900061T priority Critical patent/ATE35045T1/de
Publication of EP0207107A1 publication Critical patent/EP0207107A1/de
Application granted granted Critical
Publication of EP0207107B1 publication Critical patent/EP0207107B1/de
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F23J15/08—Arrangements of devices for treating smoke or fumes of heaters

Definitions

  • the invention relates to a method for reheating wet-cleaned flue gases from combustion plants operated with fossil fuels prior to their introduction into a chimney, in which the thermal energy to be supplied to the cleaned flue gases is generated in an additional furnace.
  • One way of reheating is to transfer the heat of the hot raw gas to the cold clean gas in a regenerative heat transfer system before it is introduced into the wet scrubber.
  • these regenerative heat transfer systems require high investment costs.
  • the object of the invention is to enable simple and, in particular, economical reheating of the pure gases in a method of the type mentioned at the outset.
  • This object is achieved in that the heat energy to be supplied to the cleaned flue gases is generated in a fluidized bed furnace.
  • the thermal energy required for reheating the clean gases can be obtained by burning low-quality and therefore cheaper fuels such as B. ballast coal or garbage can be obtained.
  • B. ballast coal or garbage can be obtained.
  • the economic advantage that can be achieved compared to the use of high-quality, expensive fuels such as natural gas or light heating oil, but also high-quality coal, as would be required for dust firing, is obvious.
  • the process can be carried out particularly economically if, according to a further feature of the invention, sulfur-binding substances, eg. B. limestone, and the exhaust gases from the fluidized bed combustion after the separation of the dust are mixed with the clean gas. Then the otherwise necessary heat exchanger for the indirect transfer of the heat of the flue gas from the fluidized bed furnace to the clean gases can be dispensed with.
  • the flue gases in turn do not have to be passed through the wet scrub to separate pollutants, in particular the sulfur oxides, and then also be heated again.
  • the formation of nitrogen oxides is low anyway in a fluidized bed due to the relatively low combustion temperatures of about 750 0 C to 900 ° C.
  • At least a partial stream of the cold clean gas is passed through an immersion heating surface arranged in the fluidized bed furnace and the clean gas heated in this way is again mixed with the remaining flue gas stream.
  • the temperature of the flue gases withdrawing from the fluidized bed furnace is reduced, which has an advantageous effect on the dedusting of these flue gases.
  • the method according to the invention is particularly suitable for use in old plants or old power plants which have to be retrofitted with flue gas cleaning plants within a transition period in order to meet the regulations for operating large combustion plants.
  • old systems the use of thermal energy generated in additional furnaces often offers the only way to economically reheat the clean gases, since e.g. B. the use of regenerative heat transfer systems can jeopardize the profitability of the retrofitted system because of the high investment costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treating Waste Gases (AREA)
  • Chimneys And Flues (AREA)
  • Fluidized-Bed Combustion And Resonant Combustion (AREA)
EP86900061A 1984-12-20 1985-12-17 Verfahren zur wiederaufheizung nassgereinigter rauchgase Expired EP0207107B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86900061T ATE35045T1 (de) 1984-12-20 1985-12-17 Verfahren zur wiederaufheizung nassgereinigter rauchgase.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843446511 DE3446511A1 (de) 1984-12-20 1984-12-20 Verfahren zur wiederaufheizung nassgereinigter rauchgase
DE3446511 1984-12-20

Publications (2)

Publication Number Publication Date
EP0207107A1 EP0207107A1 (de) 1987-01-07
EP0207107B1 true EP0207107B1 (de) 1988-06-08

Family

ID=6253323

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86900061A Expired EP0207107B1 (de) 1984-12-20 1985-12-17 Verfahren zur wiederaufheizung nassgereinigter rauchgase

Country Status (4)

Country Link
US (1) US4706580A (cg-RX-API-DMAC7.html)
EP (1) EP0207107B1 (cg-RX-API-DMAC7.html)
DE (2) DE3446511A1 (cg-RX-API-DMAC7.html)
WO (1) WO1986003823A1 (cg-RX-API-DMAC7.html)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5006322A (en) * 1988-12-12 1991-04-09 Blount Energy Resource Corp. Controlling pollutants from boilers

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE788481A (fr) * 1972-09-06 1973-01-02 Belgonucleaire Sa Perfectionnements au traitement des residus combustibles
IN155791B (cg-RX-API-DMAC7.html) * 1980-12-19 1985-03-09 Richard John Monro
DE3103399A1 (de) * 1981-02-02 1982-08-05 Saarberg-Fernwärme GmbH, 6600 Saarbrücken Vorrichtung zum erzeugen und reinigen von gasen und daempfen
DE3136480A1 (de) * 1981-09-15 1983-06-30 Steag Ag, 4300 Essen Verfahren und anordnung zum wiederaufheizen von nassentschwefelten rauchgasen
US4509347A (en) * 1982-06-30 1985-04-09 Southern Steel Company Door locking system
SE438846B (sv) * 1982-11-12 1985-05-13 Flaekt Ab Forfarande och anordning for rening av rokgaser fran svaveldioxid

Also Published As

Publication number Publication date
WO1986003823A1 (fr) 1986-07-03
US4706580A (en) 1987-11-17
DE3563260D1 (en) 1988-07-14
DE3446511A1 (de) 1986-07-10
DE3446511C2 (cg-RX-API-DMAC7.html) 1988-04-14
EP0207107A1 (de) 1987-01-07

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