Smoke cooling system for carbon calcinator

Abstract

The invention relates to the field of waste heat recovery, in particular to a smoke cooling system for a carbon calcinator. The smoke cooling system for the carbon calcinator comprises the calcinator,a first-stage boiler, a second-stage boiler, an economizer, a smoke heat exchanger, and a desulfurization tower. Smoke generated by the calcinator sequentially passes through the first-stage boiler,the second-stage boiler, the economizer and the smoke heat exchanger and then exhausted after being treated in the desulfurization tower. According to the smoke cooling system for the carbon calcinator, smoke is cooled to the temperature below 100 DEG C, and waste heat of smoke is recovered while the exhaust smoke temperature is decreased; and meanwhile, the desulfurization efficiency is improved,and water consumption for desulfurization is reduced. A heat exchange of a straight channel structure is adopted to serve as the smoke heat exchanger, and thus the problems of blockage and corrosion,caused by accumulated ash, of a channel can be solved.

Description

technical field [0001] The invention relates to the field of waste heat recovery, in particular to a flue gas cooling system of a carbon calciner. Background technique [0002] Carbon is a raw material for the aluminum industry, mainly used for the production of electrolytic aluminum. With the continuous increase of domestic aluminum consumption, the demand for electrolytic aluminum is increasing year by year, resulting in a huge gap in carbon demand. Petroleum coke calcination is the main process for producing carbon. [0003] Petroleum coke calcinations in my country are mainly tank-type calcination furnaces and rotary kilns. Tank-type calcination furnaces are the earliest calcination equipment used in my country. They can calcine raw petroleum cokes with different volatile content. Low loss rate, high bulk density of calcined coke, simple operation, small maintenance workload, long continuous production cycle, etc., so it is widely used in large, medium and small carbon f...

AI Technical Summary

Problems solved by technology

[0005] With the improvement of environmental protection requirements, it is necessary to control the amount of dust in flue gas and pollutants such as SO2. At present, the common treatment method is to use wet desulfurization (FGD). When the flue gas temperature is higher than 160°C, the glass flakes will burst. When the flue gas temperature is higher than 180°C, the glass flakes will burst and fall off. In order to solve this problem, it is necessary to design flue gas spray cooling facilities before the desulfurization tower , which not only results in huge desulfurization power consumption and water consumption, but also the device is often shut down due to blockage of the spray pipe, which cannot run smoothly for a long period of time

Images