A system for cleaning and utilizing waste heat from calcium carbide furnace waste incineration

Abstract

The invention belongs to the technical field of energy environment protection, and particularly relates to a calcium carbide furnace waste incineration and waste heat clean utilization system. The system comprises an ash resource separation device, a first boiling furnace, a second boiling furnace and a third boiling furnace; the ash resource separation device is used for separating the ash resource into purified ash, dedusted ash and semi-coke powder; the first boiling furnace, the second boiling furnace and the third boiling furnace are used for respectively inputting the purified ash, the dedusted ash and the semi-coke powder into incineration equipment for full incineration, and respectively inputting gas with heat generated by combustion into different heat exchangers; each heat exchanger is internally provided with a spiral air circulation pipeline; and air in the spiral air circulation pipelines is fully in contact with the heat in the heat exchangers and then enters a dryer tocomplete drying work, the temperature of the air completing drying enters each heat exchanger again for heat exchange after, drying is carried out again after the temperature requirement is met, and the air flow rate and the air temperature after heat exchange are controlled according to the drying requirement. The system has the beneficial effects that the heat generated after incineration of thesystem can be fully utilized, and the drying quality of the carbon material can be effectively controlled.

Description

technical field [0001] The invention belongs to the technical field of energy and environmental protection, and in particular relates to a system for cleaning and utilizing waste heat of calcium carbide furnace waste incineration. Background technique [0002] Calcium carbide production enterprises use calcium carbide furnaces to produce calcium carbide. The calcium carbide furnace is the main equipment for producing calcium carbide. The high temperature emitted by the arc in the furnace melts the charge to produce calcium carbide. The theoretical core of the calcium carbide furnace is to form a directional high-temperature ion current arc through ionized air, convert electrical energy into heat energy, and provide a sufficiently high temperature field for the reduction reaction of lime and semi-coke. In the production of calcium carbide, the flue gas emitted by the calcium carbide furnace is the largest source of pollution. As of the end of 2018, according to incomplete st...

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Problems solved by technology

However, the heat energy generated after incineration is not fully utilized, resulting in a waste of resources. For example, the calcium carbide furnace purification and incineration equipment produced by our factory was put into use in 2018. The original relatively scattered calcium carbide furnace purification ash and dust removal ash are concentrated to the purification ash through a pneumatic conveying system. In the ash storage bin, all the dust removal ash in the ash storage bin is transported to the fluidized fluidized furnace for incineration. At the same time of harmless treatment, the available heat of the dust removal ash is used, but the utilization rate of the available heat is low, and it will cause damage to the drying of the semi-coke in the later stage. Pollution, leading to the reduction of semi-coke quality, resulting in certain economic losses

[0004] In addition, the existing calcium carbide furnace purification ash and dedusting ash treatment equipment, such as Chinese patent CN 110081434A, discloses a calcium carbide furnace purification ash treatment equipment. Although it discloses the use of air as a medium for semi-coke drying, it is not fully utilized. Dust and semi-coke powder, the heat exchanger and air exchange process are inefficient, and the drying quality cannot be controlled. The most important thing is that the heat in the heated air cannot be reused or reused, resulting in a large amount of resources. waste of

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