DE3249786C2 - Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects - Google Patents
Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objectsInfo
- Publication number
- DE3249786C2 DE3249786C2 DE19823249786 DE3249786A DE3249786C2 DE 3249786 C2 DE3249786 C2 DE 3249786C2 DE 19823249786 DE19823249786 DE 19823249786 DE 3249786 A DE3249786 A DE 3249786A DE 3249786 C2 DE3249786 C2 DE 3249786C2
- Authority
- DE
- Germany
- Prior art keywords
- absorbent
- flue gas
- building material
- dry
- residual solids
- 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 - Lifetime
Links
- 239000007787 solid Substances 0.000 title claims description 18
- 239000003546 flue gas Substances 0.000 title claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 6
- 239000004566 building material Substances 0.000 title claims description 6
- 239000002250 absorbent Substances 0.000 claims description 15
- 230000002745 absorbent Effects 0.000 claims description 15
- 238000006477 desulfuration reaction Methods 0.000 claims description 11
- 230000023556 desulfurization Effects 0.000 claims description 11
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 10
- 239000010881 fly ash Substances 0.000 claims description 10
- 229910052925 anhydrite Inorganic materials 0.000 claims description 8
- 239000007795 chemical reaction product Substances 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 239000003344 environmental pollutant Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000000465 moulding Methods 0.000 claims description 4
- 231100000719 pollutant Toxicity 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 claims 1
- 239000000779 smoke Substances 0.000 claims 1
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 3
- 239000011575 calcium Substances 0.000 description 3
- 229910052791 calcium Inorganic materials 0.000 description 3
- 239000001110 calcium chloride Substances 0.000 description 3
- 229910001628 calcium chloride Inorganic materials 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003077 lignite Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000011507 gypsum plaster Substances 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 238000005987 sulfurization reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/062—Purification products of smoke, fume or exhaust-gases
- C04B18/064—Gypsum
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Civil Engineering (AREA)
- Combustion & Propulsion (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (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
Verwendung der bei der trockenen Absorptionsmittel-Entschwefelung von Rauchgasen hinter mit Braunkohle befeuerten Kraftwerkskessel feuerungen im Feststoffabscheider trocken anfallenden Rückstandsfest stoffe, die neben dem Absorptionsmittel und den Reaktionsprodukten des Absorptionsmittels mit den Schadstoffen des Rauchgases Flugasche enthalten, in wäßriger Aufschlämmung als Baustoff zur Herstellung von Formkörpern, die als Formsteine oder als Zuschlagstoffe einsetz bar sind, mit der Maßgabe, daß die Entschwefelung hauptsächlich zu Anhydrit als Feststoff geführt wurde. Use in dry absorbent desulfurization of flue gases behind lignite-fired power plants Firings in the solid matter separator dry residue-proof substances in addition to the absorbent and the reaction products of the absorbent with the pollutants of the flue gas fly ash included, in aqueous slurry as a building material for manufacture of shaped bodies that are used as shaped stones or as aggregates are bar, with the proviso that the desulfurization mainly to Anhydrite was performed as a solid.
Die Erfindung bezieht sich auf die Verwertung der bei der trockenen Absorptionsmittel-Entschwefelung von Rauchgasen hinter mit Braun kohle befeuerten Kraftwerkskesselfeuerungen im Feststoffabscheider trocken anfallenden Rückstandsfeststoffe, die neben dem Absorptions mittel und den Reaktionsprodukten des Absorptionsmittels mit den Schad stoffen im Rauchgas Flugasche enthalten. - Als Absorptionsmittel bei der trockenen Entschwefelung von Rauchgasen dienen bekanntlich calciumhaltige Verbindungen wie Calciumoxid, Calciumhydroxid und insbes. Calciumcarbonat, ggf. mit Beimischung entsprechender Magnesium verbindungen. Das Absorptionsmittel wird entweder dem Brennstoff zuge mischt oder in dem Brennraum bzw. in die Rauchgase eingeschleust (DE-PS 28 07 076). Die trockene Absorptionsmittel-Entschwefelung läßt sich so führen, daß sich vorrangig Anhydrit (CaSO4) bildet. Die im Feststoffabscheider, z. B. einem Elektrofilter, abgeschiedenen Rück standsfeststoffe enthalten neben dem Absorptionsmittel und den Reak tionsprodukten des Absorptionsmittels mit den Schadstoffen im Rauch gas Flugasche. Der Anteil der Flugasche liegt, hinter mit Braun kohle befeuerten Kraftwerkskesselfeuerungen, je nach Schwefelgehalt, zwischen 15 und 60 Gew.%, im allgemeinen bei etwa 40 Gew.%. Trotz stark schwankendem Flugaschegehalt, wie es bei der Verfeuerung von Braunkohle vorkommt, ist es möglich, durch entsprechende Verfahrens führung für einen gleichmäßigen Gehalt an Anhydrit in den Rückstands feststoffen zu sorgen.The invention relates to the recovery of dry solids in the dry absorbent desulfurization of flue gases behind brown coal-fired power plant boilers in the solids separator, which in addition to the absorption medium and the reaction products of the absorbent with the harmful substances in the flue gas contain fly ash. - Calcium-containing compounds such as calcium oxide, calcium hydroxide and in particular calcium carbonate, if appropriate with admixture of appropriate magnesium compounds, are known to serve as absorbents in the dry desulfurization of flue gases. The absorbent is either mixed with the fuel or introduced into the combustion chamber or into the flue gases (DE-PS 28 07 076). The dry absorbent desulfurization can be carried out so that primarily anhydrite (CaSO 4 ) is formed. The in the solids separator, e.g. B. an electrostatic precipitator, deposited residue solids contain in addition to the absorbent and the reaction products of the absorbent with the pollutants in the flue gas fly ash. The proportion of fly ash, behind brown coal-fired power plant boilers, is between 15 and 60% by weight, depending on the sulfur content, generally around 40% by weight. In spite of the strongly fluctuating fly ash content, as occurs when lignite is burned, it is possible to ensure a uniform anhydrite content in the residue solids through appropriate process management.
Bisher sind die genannten Rückstandsfeststoffe ohne weiteres nicht verwertbar. Sie werden zu einer Deponie geführt und dort abgelagert. Das ist nicht frei von Nachteilen. Einerseits ist ein großer Platzbedarf erforderlich, andererseits bedeutet diese Ablagerung eine Belastung der Umwelt, zumal eine Auslaugung der Rückstandsfeststoffe unter atmosphärischen Bedingungen zu befürchten ist.So far, the residue solids mentioned are not easily usable. You will be taken to a landfill and deposited there. This is not without drawbacks. On the one hand, it takes up a lot of space required, on the other hand this deposit means a burden the environment, especially since leaching of the residue solids under atmospheric conditions is to be feared.
Bei einer von der trockenen Entschwefelung unterschiedenen nassen Ent schwefelung von Rauchgasen hinter Kraftwerkskesselfeuerungen ist es bekannt (DE-OS 28 03 764), unter Einsatz der genannten calciumhaltigen Verbindungen in einer Waschflüssigkeit gleichzeitig mit dem Schwefel dioxid die Flugasche auszuwaschen, die wäßrige Aufschlämmung thermisch zu behandeln und das Calciumsulfat der Aufschlämmung in Gips der Struktur Alpha- und/oder Beta-Anhydrit und/oder Halbhydrat umwandeln sowie die erhaltene Suspension aus Flugasche und Anhydrit und/oder Halbhydrat in Formen zu gießen, wo ein Abbinden zu Bau steinen oder Bauplatten erfolgt. Das sind, insbesondere wegen der Um wandlung, verhältnismäßig aufwendige Verwertungsmaßnahmen. Auch ist es bei der nassen Entschwefelung mit den genannten calciumhaltigen Behandlungsmitteln bei gleichzeitiger Ausfällung von Calciumchlorid bekannt (DE-OS 31 09 879), die Abfallprodukte Flugasche, Entschwe felungsgips und nasses oder trockenes Calciumchlorid zu mischen, um die Mischung, im allgemeinen unter weiterer Zuführung von Bindemitteln, Härtern und Zement als Baustoffe in Untertageräumen des Bergbaus einzusetzen, und zwar für Zwecke des Dammbaus, für Hinterfüllzwecke oder Streckenkonsolidierungszwecke. Dazu ist eine Trocknung erforderlich, auch muß das Calciumchlorid durch Eindampfen gewonnen werden. Zwar bedient man sich hierzu der fühlbaren Wärme der Rauchgase, nichtsdestoweniger sind auch diese bekannten Maßnahmen aufwendig.With a wet Ent differentiated from the dry desulfurization It is sulfurization of flue gases behind power plant boilers known (DE-OS 28 03 764), using the calcium-containing Compounds in a washing liquid simultaneously with the sulfur dioxide to wash out the fly ash, the aqueous slurry heat treat and the calcium sulfate in the slurry Gypsum with the structure alpha and / or beta anhydrite and / or hemihydrate convert and the suspension obtained from fly ash and anhydrite and / or pour hemihydrate into molds where setting to build stones or building boards. That is, especially because of the order conversion, relatively complex recovery measures. Also it is with wet desulphurization with the calcium-containing ones mentioned Treatment agents with simultaneous precipitation of calcium chloride known (DE-OS 31 09 879), the waste products fly ash, decoupling mix gypsum plaster and wet or dry calcium chloride to the mixture, generally with the further addition of binders, Hardeners and cement as building materials in underground mining areas use, namely for the purpose of dam building, for backfilling purposes or route consolidation purposes. This requires drying, the calcium chloride must also be obtained by evaporation. Although one uses the sensible heat of the flue gases for this, nevertheless, these known measures are also complex.
Der Erfindung liegt die Aufgabe zugrunde, die bei der trockenen Ab sorptionsmittel-Entschwefelung von Rauchgasen hinter Braunkohle be feuerten Kraftwerkskesselfeuerungen anfallenden Rückstandsfeststoffe auf einfache Weise einer Verwertung zuzuführen. The invention has for its object in the dry From sorbent desulfurization of flue gases behind lignite fired residue solids to be recycled in a simple manner.
Die Lösung dieser Aufgabe besteht in der Verwendung der bei trockenen Absorptionsmittel-Entschwefelung von Rauchgasen hinter mit Braun kohle befeuerten Kraftwerkskesselfeuerungen im Feststoffabscheider trocken anfallenden Rückstandsfeststoffe, die neben dem Absorptions mittel und den Reaktionsprodukten des Absorptionsmittels mit den Schadstoffen im Rauchgas Flugasche enthalten, in wäßriger Aufschläm mung als Baustoff zur Herstellung von Formkörpern, die als Formsteine oder als Zuschlagstoffe einsetzbar sind, mit der Maßgabe, daß die Entschwefelung hauptsächlich zu Anhydrit als Feststoff geführt wurde. - Überraschenderweise genügen die genannten Rückstandsfeststoffe allen Anforderungen, die an einen Baustoff zur Herstellung von Formkörpern, die als Formsteine oder als Zuschlagstoffe einsetzbar sind, gestellt werden müssen, wenn die Entschwefelung so geführt wird, daß haupt sächlich Anhydrit entsteht. Die Formkörper besitzen eine sehr hohe Druckfestigkeit.The solution to this problem is to use the dry Absorbent desulfurization of flue gases behind with brown coal-fired power plant boilers in the solids separator dry residual solids, in addition to the absorption medium and the reaction products of the absorbent with the Pollutants contained in the flue gas fly ash, in aqueous slurry mung as a building material for the production of moldings, which as shaped blocks or can be used as additives, with the proviso that the Desulfurization was mainly carried out to anhydrite as a solid. - Surprisingly, all of the residue solids mentioned are sufficient Requirements for a building material for the production of moldings, which can be used as shaped stones or as aggregates must be, if the desulfurization is carried out in such a way that anhydrite arises. The moldings have a very high Compressive strength.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19823249786 DE3249786C2 (en) | 1982-08-28 | 1982-08-28 | Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3232078A DE3232078C2 (en) | 1982-08-28 | 1982-08-28 | Use of the residue solids from dry flue gas desulphurization as a building material for backfilling underground spaces in mining |
| DE19823249786 DE3249786C2 (en) | 1982-08-28 | 1982-08-28 | Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3249786C2 true DE3249786C2 (en) | 1990-02-08 |
Family
ID=25804067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19823249786 Expired - Lifetime DE3249786C2 (en) | 1982-08-28 | 1982-08-28 | Use of the residual solids from dry flue gas desulphurisation as building material for producing shaped objects |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3249786C2 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE802924C (en) * | 1948-09-21 | 1951-02-26 | Hans Dr-Ing Wuennenberg | Plaster mix |
| DE2400350A1 (en) * | 1974-01-04 | 1975-07-17 | Heinz Hoelter | Converting power station wastes into usable materials - fly ash and calcium sulphate mixed to form construction materials |
| DE2803764A1 (en) * | 1978-01-28 | 1979-08-16 | Saarbergwerke Ag | Utilising fly ash and calcium sulphate obtd. from flue gas - of coal burning furnace desulphurisation units, by heating aq. suspension to form anhydrite, and casting into bricks, etc. |
| DE2807076B1 (en) * | 1978-02-18 | 1979-09-06 | Rheinisch-Westfaelisches Elektrizitaetswerk Ag, 4300 Essen | Process for reducing sulfur emissions from boiler furnaces |
| DE2906230A1 (en) * | 1979-02-17 | 1980-08-28 | Steag Ag | Disposal of residue obtd. from waste gas washing plants - where residue is calcined to form beta calcium sulphate hemi:hydrate employed to reinforce tunnels in underground mines |
| DE3113714C2 (en) * | 1981-03-14 | 1985-09-19 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process |
| DE3232079C2 (en) * | 1982-08-28 | 1986-05-22 | Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen | Use of residual plaster and dry residue from a wet or dry working flue gas desulphurisation system |
-
1982
- 1982-08-28 DE DE19823249786 patent/DE3249786C2/en not_active Expired - Lifetime
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE802924C (en) * | 1948-09-21 | 1951-02-26 | Hans Dr-Ing Wuennenberg | Plaster mix |
| DE2400350A1 (en) * | 1974-01-04 | 1975-07-17 | Heinz Hoelter | Converting power station wastes into usable materials - fly ash and calcium sulphate mixed to form construction materials |
| DE2803764A1 (en) * | 1978-01-28 | 1979-08-16 | Saarbergwerke Ag | Utilising fly ash and calcium sulphate obtd. from flue gas - of coal burning furnace desulphurisation units, by heating aq. suspension to form anhydrite, and casting into bricks, etc. |
| DE2807076B1 (en) * | 1978-02-18 | 1979-09-06 | Rheinisch-Westfaelisches Elektrizitaetswerk Ag, 4300 Essen | Process for reducing sulfur emissions from boiler furnaces |
| DE2906230A1 (en) * | 1979-02-17 | 1980-08-28 | Steag Ag | Disposal of residue obtd. from waste gas washing plants - where residue is calcined to form beta calcium sulphate hemi:hydrate employed to reinforce tunnels in underground mines |
| DE3113714C2 (en) * | 1981-03-14 | 1985-09-19 | Hölter, Heinz, Dipl.-Ing., 4390 Gladbeck | Process for the recycling of waste products from coal-fired power stations as roadside dam material and backfill material and material produced according to the process |
| DE3232079C2 (en) * | 1982-08-28 | 1986-05-22 | Rheinisch-Westfälisches Elektrizitätswerk AG, 4300 Essen | Use of residual plaster and dry residue from a wet or dry working flue gas desulphurisation system |
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