Cement kiln system and method for preparing cement clinker: Fid-Bau Portal

Cement kiln system and method for preparing cement clinker

DAI ZHONGYUAN / HU ZHIJUAN / PENG XUEPING / CHEN CHANGHUA / ZHAO LIANG

The cement kiln system comprises a smoke chamber (1), a rotary kiln (2), a cooling machine (3), a first raw material preheating and pre-decomposing system and a second raw material preheating and pre-decomposing system, the smoke chamber (1), the rotary kiln (2) and the cooling machine (3) are sequentially communicated, and the first raw material preheating and pre-decomposing system and the second raw material preheating and pre-decomposing system are respectively communicated with the smoke chamber (1). And a discharging pipe of the cyclone separator at the top end of the second raw material preheating and pre-decomposing system is communicated with a feeding hole of the cyclone separator at the top end of the first raw material preheating and pre-decomposing system. The technical problems that in an existing cement kiln system, due to the fact that the concentration of CO 2 in flue gas is low, the purification operation process of CO 2 is complex, due to the fact that poor-quality raw materials are adopted, the content of SO 2 in the flue gas entering the CO 2 purification system is high, the CO 2 purification system needs to conduct desulfurization treatment on the flue gas, and the investment cost and the operation cost of the CO 2 purification system are greatly improved are solved.

一种水泥窑系统及方法，系统包括烟室(1)、回转窑(2)、冷却机(3)、第一生料预热预分解系统和第二生料预热预分解系统，烟室(1)、回转窑(2)、冷却机(3)依次连通，第一生料预热预分解系统、第二生料预热预分解系统分别与烟室(1)连通，第二生料预热预分解系统的顶端旋风分离器的下料管与第一生料预热预分解系统的顶端旋风分离器的进料口连通。解决现有水泥窑系统由于烟气中CO 2浓度偏低，造成CO 2的提纯操作流程复杂，以及因生料采用劣质原料，引起进CO 2提纯系统的烟气中SO 2含量偏高，使得CO 2提纯系统需要对烟气进行脱硫处理，从而大大提高CO 2提纯系统的投资成本和运行成本的技术问题。

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