Petroleum coke calcining flue gas processing method

Abstract

The invention discloses a method for treating flue gas generated by petroleum coke calcination. The method comprises the following steps: firstly, dusty flue gas generated by a petroleum coke cooler undergoes primary dedusting through a deduster, and usable petroleum coke dust collected after primary dedusting is returned to a production system as a production material; flue gas treated by primary dedusting is led in a rotary kiln flue gas treatment system through a draft fan; carbon dust contained in the flue gas undergoes combustion treatment inside a combustion chamber; and finally the flue gas is discharged into the atmosphere through the draft fan and a chimney. Due to adopting a dry method, namely a combustion (incineration) treatment method, the method does not cause the problems of water resource consumption and secondary treatment of sewage; meanwhile, the method ensures high recovery rate and high comprehensive utilization rate of petroleum coke dust in the flue gas after calcination; moreover, the method has the advantages of improvement of flue gas purification efficiency in raw materials, reduction of production cost, simple equipment, less land occupation and great reduction of construction capital investment and production and operation cost.

Description

Technical field: [0001] The invention relates to a method for processing flue gas from petroleum coke calcination in a prebaked anode production system. Background technique: [0002] Calcination of petroleum coke is an important part in the production of prebaked anodes in the aluminum electrolysis production system. After the raw petroleum coke is calcined at high temperature, the calcined coke at 1000℃~1100℃ is discharged from the kiln head of the rotary kiln into the cooler for cooling. , the cooling of petroleum coke is usually combined with the indirect cooling method of spraying water outside the cylinder of the cooler and the direct cooling method of directly spraying water into the cylinder. In the direct cooling mode, the cooling water is directly sprayed on the high-temperature calcined Petroleum coke produces a large amount of fumes containing dust and steam, which must be treated before being discharged. [0003] At present, the flue gas containing dust and ste...

AI Technical Summary

Problems solved by technology

If the flue gas temperature is too high, the bag in the bag filter will be damaged due to the high flue gas temperature, which will affect the dust collection efficiency; if the flue temperature is too low, the moisture in the flue gas will condense, and the bag in the bag filter will The temperature of the flue gas is too low and it is covered with water droplets, which makes the carbon dust adhere to the bag, and the bag filter will cause the bag to be blocked due to the condensation of water vapor on the filter bag, which will affect the dust collection