A PFR lime kiln (parallel flow regenerative double-bore lime kiln) consists of two vertical kiln cylinders and a cross-connecting channel. The two kilns work alternately. While one kiln barrel calcines the product, the other preheats the limestone raw material. The lime is calcined by parallel flow in the combustion cylinder. The high-temperature gas then passes through the cross channel to the non-combustion cylinder and counterflows in the upper area of the kiln cylinder....
The rotary kiln system of calcined lime mainly consists of three parts: preheater, rotary kiln and cooler. Preheaters and coolers are mostly vertical structures, which are widely used because of their good heat transfer effect. Rotary kiln is a rotary moving body arranged in flat shape. Materials are preheated from the kiln tail preheater into the kiln, and calcined at about 1400℃ under rolling and turning....
Working principle: The material enters the kiln from the top of the shaft kiln, preheats by convection in the pre-zone, and then enters the upper calcination zone, where the incomplete burning hot flue gas rising from the middle calcination zone completely burns, and heats and decomposes the material. Then, the material enters the middle calcination zone, and the hot flue gas separated from the lower calcination zone is further heated and decomposed....
Suspension kiln is a kind of kiln in which fine granular or powdery materials are suspended in hot gas flow under the action of heat-carrying gas, and intense heat and mass transfer process occurs between gas and solid....
Merz double-bore lime Kiln carbon dioxide recycling technology EcoKiln is an innovative technology suitable for China's carbon peak and carbon neutral environment! On the basis of parallel flow regenerative double-chamber shaft kiln, CO2 is enriched in flue gas by oxygen-rich combustion structure and cooling air extraction, which is convenient for CO2 recovery and storage....
