Application method of circulating fluidized bed roasting rotary integrated furnace

Abstract

The invention relates to the technical fields of environmental protection and resource cyclic and comprehensive utilization, in particular to an application method of a circulating fluidized bed roasting rotary integrated furnace. The application method is characterized in that a roasting excitation rotary furnace and a circulating fluidized bed coal-fired furnace are included; by means of a guiding pipe designed to be arranged beside an outlet of a material return pipe, the local bore pressure of the outlet of the material return pipe is reduced, and thus the material column height of a vertical pipe is reduced; and the purposes that materials are balanced, and separation efficiency is guaranteed are achieved, and the circulating fluidized bed coal-fired furnace and the roasting excitation rotary furnace can be effectively combined and operate normally. High-temperature flue gas carries fly ash of the circulating fluidized bed coal-fired furnace to enter an ejector through a hot air channel, is mixed with materials such as a guiding agent and then is guided by a flow dividing cone to pounce at spiral blades of a distributor and tossed to the inner wall of a rotating excitation rotary barrel body in the rotation tangential direction of the spiral blades under the effect of centrifugal force; and a high-aluminum ball stacking layer suspends in the rotating excitation rotary barrel body, and mutual rubbing and grinding are conducted, so that kaolin finished product particles are obtained.

Description

technical field [0001] The invention relates to the technical field of environmental protection and resource recycling and comprehensive utilization, in particular to a method for using a circulating fluidized bed roasting and rotary integrated furnace. Background technique [0002] Kaolin is widely used, mainly used in papermaking, ceramics, rubber and plastics, chemical industry, paint, medicine and other industries. The main mineral component of kaolin is kaolinite, and the crystal chemical formula of kaolinite is 2SiO 2 ·Al 2 o 3 2H 2 O, through the calcination process to remove organic matter and lattice reconstruction; mechanical pulverization and jet pulverization to a sufficient fineness to meet the requirements of preparing fillers such as cable plastics and rubber sealing rings, paper coatings, molecular sieves, and catalyst carriers. Circulating fluidized bed coal-fired boiler fly ash is the most common waste in the boiler production process, the main component...

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Problems solved by technology

[0003] The purpose of the technical solution proposed in prior art 1 is to provide a sludge drum external heat drying and circulating fluidized bed incineration integration and tail gas purification device, which is relatively close to the design of this case, but the circulating fluidized bed coal-fired furnace The outlet temperature of the furnace is 900±50°C, while the activation temperature of kaolin is required to reach 900-1280°C. The rotary kiln roller is interspersed and installed on the flue at the end of the circulating fluidized bed. The heating can only be used for drying and cannot meet the requirements The process temperature conditions required for roasting and activation; prior art 2 adopts the technical scheme of combining fluidized fluidized furnace and rotary kiln, but the flue gas of fluidized fluidized furnace does not contact with the material, and the dust (fly ash) in the flue gas is used as a pollutant by settling chamber, static electricity After being purified by the dust collector, it is discharged to the chimney

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