Preventing operation disrupting mineral residues in pressure supercharged stationary fluidized bed furnace, comprises burning coal by adding biomass or waste, and supplying calcareous sorbent and foreign bed materials

• Main Authors: KURKOVA, MONIKA, MEYER, BERND
• Format: Patent
• Language: English; German
• Published: 18.04.2013
• Subjects: ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; CHEMISTRY; FIRELIGHTERS; FUELS; FUELS NOT OTHERWISE PROVIDED FOR; LIQUEFIED PETROLEUM GAS; LUBRICANTS; METALLURGY; NATURAL GAS; PEAT; PETROLEUM, GAS OR COKE INDUSTRIES; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K; TECHNICAL GASES CONTAINING CARBON MONOXIDE

Preventing operation disrupting mineral residues in pressurized fluidized bed furnace, preferably pressure supercharged stationary fluidized bed furnace (DSWSF), comprises (a) burning fuels, preferably coal other than salty coal, by adding biomass or waste, and (b) supplying calcareous sorbent for flue gas desulfurization and foreign bed materials for stabilizing the fluidized bed in addition to the fuel to the pressurized fluidized bed furnace, where fine-grained calcareous sorbent, and coarse-grained calcareous sorbent are supplied in dry form. Preventing operation disrupting mineral residues in pressurized fluidized bed furnace, preferably pressure supercharged stationary fluidized bed furnace (DSWSF), comprises (a) burning fuels, preferably coal other than salty coal, by adding biomass or waste, and (b) supplying calcareous sorbent for flue gas desulfurization and foreign bed materials for stabilizing the fluidized bed in addition to the fuel to the pressurized fluidized bed furnace, where (i) fine-grained calcareous sorbent having particle size of less than 200 mu m, preferably less than 100 mu m, is supplied in dry form in a quantity such that fine-grained calcareous sorbent available for desulfurization of flue gases comprises not > 50% stoichiometric lime quantity required for total desulfurization, and (ii) coarse-grained calcareous sorbent having particle size of less than 100 mu m is supplied in dry form in a quantity such that the required total desulfurization is reached with the maximum total desulfurization degree limited by minimum 50 mg/Nm 3>sulfur dioxide of dry flue gas, based on 7 vol.% oxygen. Die erfindungsgemäße Aufgabe besteht darin, Lösungen zu finden, mit denen die betriebsstörenden Ansatzbildungen in DSWSF-Anlagen vermieden werden kann, ohne dass konstruktive Änderungen in den DSWSF-Anlagen erforderlich sind und ohne dass die Entschwefelungsleistungen sinken. Die erfindungsgemäße Lösung beruht darauf, dass Zuschlagstoffe definierter Mengen, Körnungen und chemischer Zusammensetzungen den DSWSF-Anlagen getrennt oder gemeinsam mit den Brennstoffen, die aus Kohlen, ausgenommen Salzkohlen, sowie gegebenenfalls Zusätzen von Biomassen oder Abfällen bestehen, zugeführt werden.