Circulating fluidized bed reactor

Abstract

Circulating fluidized bed reactor especially for burning fuel, includes a combustion chamber (2) having a bed with fluidized solid particle materials therein and a solid matter cooler (3) connecting with it used for cooling the expellent ash or the solid matter (13) from the bottom of the combustion chamber (2). The cooler (3) includes: at least a turbulence chamber (4, 5, 6) used to make the to be chilled solid matter pass through in a horizontal flow, wherein the first turbulence chamber (4, 5, 6) has a inferior part (10) and a free space (11) arranged above the cooler fluidized bed (35) communicating with the gas side and the solid matter side of the corresponding turbulence chamber (4, 5, 6); an apparatus used for inputting the fluidizing agent (12) to each inferior part (10) to in order to fluidize the granular material in the turbulence chamber (4, 5, 6); at least a discharge opening (14), used for draining the fluidizing agent (12) from the free space (11) into the inferior part of the combustion chamber (2); at least an inlet port (15), connecting the first turbulence chamber (4) to the inferior part of the combustion chamber (2), used for inducting the ash (13) from the bottom vicinity of the fluidized bed firing furnace into the cooler (3); and at least a discharge opening (16), connecting with the final turbulence chamber (4, 5, 6), used for separating the solid matter grain (13) from the fluidizing agent (12) containing the solid matter grain (13) flowing in the direction of the discharge opening (14) and returning the separated solid matter (13) to the turbulence chamber (4, 5, 6).

Description

technical field [0001] The present invention relates to a circulating fluidized bed reactor, in particular for the combustion of fuels, and to a method for operating a circulating fluidized bed reactor. Background technique [0002] Such fluidized bed reactors are used in particular in energy technology or power plant technology. Therein, coal or other combustible materials, such as waste or biomass, are burned in a fluidized bed in a reactor chamber or combustion chamber. In order to separate and cool the ash or solid matter produced during the combustion of the fuel, the lower region of the combustion chamber is connected to an ash cooler or solid matter cooler. As solid matter coolers, mechanical coolers such as serpentine cooling pipes, cooling vibrating launders, etc., as well as coolers with a stationary fluidized bed such as fluidized bed coolers, ash screening machines, separation coolers are known Wait. [0003] Such fluidized bed coolers or solid matter coolers,...

AI Technical Summary

Problems solved by technology

For coolers with several cooling chambers due to excessive loading, there is the risk that a part of the solids flow flows away in the bypass of the cooling chambers and thus detrimentally reduces the cooling performance because the residence time of the solids flow no longer enough

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