Three-phase fluidized-bed reactor

The invention discloses a three-phase fluidized-bed reactor. The three-phase fluidized-bed reactor solves the technical problems of poor gas-water mixing, difficult operation, undesirable solid-liquid separating effect and high effluent turbidity of an internal circulating three-phase fluidized-bed reactor. The three-phase fluidized-bed reactor comprises a gas-water mixing area, a reacting area, separating area and a filtrating area; the gas-water mixing area is, through a micro-porous gas distributor, communicated with the reacting area which is formed by an outer barrel and an inner barrel; a precipitating area and the filtrating area are formed outside the separating area on the top and communicated with each other through a perforated plate; the filtrating area is provided with a filtering component; and the filtrating component is connected with a water outlet and back wash system which comprises a water pump, a plurality of valves, a plurality of flowmeters and the like. The three-phase fluidized-bed reactor is characterized in that: the gas-water mixing area is shaped as a column; and the filtering component is a film component. The three-phase fluidized-bed reactor is used for treating the domestic sewage and the industrial effluent, so the municipal sewage is recycled to meet the municipal non-drinking water quality standards.