A method for rapid one-time molding of high-temperature liquid calcium carbide and recovery of waste heat through a chain-belt granulator

Abstract

The invention provides a method for quick one-step molding and waste heat recovery of high temperature liquid calcium carbide by a chain belt type pelletizer. The method includes: (1) placing high temperature liquid calcium carbide discharged from a calcium carbide furnace on a conveying chain belt of the chain belt type pelletizer, with the conveying chain belt equipped with a plurality of calcium carbide dies and a calcium carbide scraping plate; (2) transporting solid calcium carbide blocks quickly to a dry quenching furnace for hot gas extraction; (3) subjecting the hot gas from the dry quenching furnace to dedusting, and then letting the hot gas enter a waste heat boiler; and (4) making the saturated steam or superheated steam from the waste heat boiler drive a steam turbine to conduct steam electric power generation. The method provided by the invention has the advantages of effectively recovering waste heat from calcium carbide heaps and other liquid materials, recycling the recovered waste heat in the form of steam for power generation, greatly shortening the cooling time of calcium carbide, avoiding heat pollution and heat waste, eliminating potential safety hazards in production, avoiding powder formation caused by manual crushing of calcium carbide, and saving workshop manpower and material resources and floor occupation, etc.

Description

technical field [0001] The invention relates to a molding and waste heat recovery method, in particular to a one-time molding and waste heat recovery method for liquid calcium carbide and other high-temperature materials with a chain conveyor chain belt structure. Background technique [0002] Calcium carbide, namely calcium carbide, is an inorganic compound, colorless crystal, and is an important basic chemical raw material, mainly used to produce acetylene gas, and also used in organic synthesis, oxyacetylene welding, etc. [0003] The cooling and crushing of calcium carbide finished products is a problem that has plagued calcium carbide enterprises for a long time. For the traditional process of cooling and crushing of calcium carbide products, please refer to figure 1 , figure 1 A schematic diagram of the traditional process. In the traditional process, the melting temperature of calcium carbide is as high as 1800°C to 2200°C. Multiple cooling pots 18 are placed at th...

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Problems solved by technology

[0004] Therefore, in the traditional cooling and crushing process of calcium carbide, there are the following defects: (1) a large amount of waste heat loss of high-temperature calcium carbide is caused, and a large production space is occupied; It can be crushed after cooling for 22-26 hours; (3) The calcium carbide in the process of natural or strong wind cooling is placed in an open place, because the calcium carbide reacts violently immediately when it meets water, and there is a great safety hazard; (4) After cooling Calcium carbide lumps need to be broken manually. On the one hand, the crushing process will cause 15-25% powder loss, resulting in the loss of calcium carbide products; on the other hand, it also increases the input of manpower and material resources in the workshop.

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