Lime, coke and calcium carbide production complex

Abstract

The present invention relates to a lime-coke-calcium carbide production joint apparatus. The production joint apparatus comprises a lime rotary kiln, a coking rotary kiln and a calcium carbide rotary kiln. The lime rotary kiln is provided with a limestone bin, a lime cooler and a lime bin; the coking rotary kiln is provided with a coal powder bin, a coke cooler and a coke powder bin; and the calcium carbide rotary kiln is provided with a calcium carbide raw material bin and a calcium carbide discharge bin. The lime bin and the coke powder bin are connected to the calcium carbide raw material bin through a mixing and ball-pressing device or a calcium carbide raw material powder conveyor, the calcium carbide raw material bin is connected to the kiln chamber of the calcium carbide rotating kiln through a kiln-end hood, and the kiln chamber is connected to the calcium carbide discharge bin through a firing hood. self-melting resistant material layers are separately coated on the kiln chamber of the calcium carbide rotating kiln and the inner wall of the calcium carbide discharge bin, and the calcium carbide discharge bin is provided with an induction heating coil. The lime-coke-calcium carbide production joint apparatus provided by the present invention makes full use of residual heat of the rotating kilns, reduces the heat loss in a production process, and comprehensively uses heat and materials, so that the energy consumption and production costs are lowered, and the emission of carbon dioxide is reduced.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and relates to a lime, coke and calcium carbide production combined device. Background technique [0002] Calcium carbide, molecular formula CaC 2 , commonly known as calcium carbide, calcium carbide reacts with water to form acetylene. Acetylene is an important chemical raw material, mainly used in the production of polyvinyl chloride-based, vinyl acetate-based and acrylic-based products. More than 70% of PVC products in my country are derived from acetylene produced by calcium carbide. my country's shortage of oil resources and relative abundance of coal resources determine that the calcium carbide industry will continue to play an irreplaceable role in meeting downstream demand. [0003] In the existing technology, lime, coke and calcium carbide production are interrelated technical fields. Lime kilns produce quicklime, coking furnaces produce coke, and provide raw materials for ...

AI Technical Summary

Problems solved by technology

During the lime calcination process, a large amount of carbon dioxide will be emitted. On average, every ton of lime produced will emit close to a ton of carbon dioxide. In traditional lime calcination equipment, the carbon dioxide will be discharged into the atmosphere along with the flue gas. Due to the low concentration of carbon dioxide mixed with the flue gas, the recovery cost is high. It is not conducive to recovery; in the traditional coke production process, coal carbonization equipment uses internal heating carbonization furnace, the carbonization effect is poor, the coke still contains a high content of volatile components, and the carbonization gas is also mixed with the combustion flue gas of the carbonization furnace, and tar and combustible gas are recovered Poor effect and high pollution emissions; in traditional lime kilns, fuel combustion directly calcines limestone, and harmful substances and impurities directly fall into quicklime products during the calcination process, which affects the quality of quicklime, which is not conducive to the production of high-quality quicklime, and also affects the quality of calcium carbide. Product quality, the degree of coking of coke is low, and the content of volatile components is high. After entering the calcium carbide furnace, the pollution of the calcium carbide furnace will be further increased.

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