用于水泥生料煅烧的外热式回转电煅烧炉。

Electrified externally heated rotary calciner for calcination of cement raw meal.

作者信息

Jacob Ron M, Pinheiro Jean-Patrick, Tokheim Lars-André

机构信息

University of South-Eastern Norway, Kjølnes ring 56, 3918, Porsgrunn, Norway.

Institute for Energy Technology, Instituttveien 18, 2007, Kjeller, Norway.

出版信息

Heliyon. 2023 Nov 4;9(11):e22023. doi: 10.1016/j.heliyon.2023.e22023. eCollection 2023 Nov.

DOI:10.1016/j.heliyon.2023.e22023

PMID:38027667

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10658365/

Abstract

The cement industry can reduce its CO emissions by electrifying the calciner. It can avoid emissions from fuel combustion and produce pure CO from the calcination reaction (CaCO → CaO + CO) for direct capture. A differential-algebraic equation (DAE) model of an electrified rotary calciner was developed and validated against experimental results. The heat transfer coefficient was around 30 W/(mK), with the calciner inclined at 15°. This value increased to 80 W/(mK) by reducing the inclination to 2°. The rotary calciner for producing 1 Mton/yr clinker with an internal diameter of 5 m needs a length of 485 m to reach a calcination degree of 94 %. The large system size suggests that this calciner may not be suitable for full-scale production. However, it can still be used for small-scale green production of calcined limestone.

摘要

水泥行业可以通过将煅烧炉电气化来减少其二氧化碳排放。它可以避免燃料燃烧产生的排放，并从煅烧反应（CaCO₃ → CaO + CO₂）中产生纯二氧化碳用于直接捕获。开发了一个电气化回转煅烧炉的微分代数方程（DAE）模型，并根据实验结果进行了验证。煅烧炉倾斜15°时，传热系数约为30 W/(m²K)。通过将倾斜度降低到2°，该值增加到80 W/(m²K)。用于生产100万吨/年熟料、内径为5米的回转煅烧炉需要485米的长度才能达到94%的煅烧程度。较大的系统规模表明这种煅烧炉可能不适合大规模生产。然而，它仍然可以用于煅烧石灰石的小规模绿色生产。