Control method for anode-baking flue gas dust collection classified spraying

Abstract

The invention discloses a control method for anode-baking flue gas dust collection classified spraying, comprising the steps that: when the temperature of an electric collector inlet (4) exceeds 90 DEG C, two groups of nozzles of a unit II (2) operate, and when the temperature of the electric collector inlet (4) drops to 85 DEG C, the nozzles of the unit II (2) stop operating; after the nozzles of the unit II (2) operate, two groups of nozzles of a unit III (3) operate when the temperature of the electric collector inlet (4) exceeds 95 DEG C, and two groups of nozzles of the unit III (3) stop operating when the temperature of the electric collector inlet (4) drops to 90 DEG C. The method solves the problem of discharging a large amount of wastewater before transformation, lessens environmental pollution and enhances system safety.

Description

(1) Technical field: [0001] The invention relates to a control method for dust collection and classification spraying of anode roasting flue gas, which belongs to the technical field of metallurgical machinery. (2) Background technology: [0002] At present, the dust collection methods for anode roaster flue gas at home and abroad include electric capture method, alumina adsorption dust collection method, coke powder adsorption dust collection method and alkali absorption wet method, and among them, electric capture method and alumina adsorption dust collection method All dust methods need spray cooling technology, that is, a cooling device is installed in front of the dust collector to ensure the safety of the dust collector and improve the dust collection efficiency. The temperature of the flue gas from the roaster is between 120°C and 200°C, and the tar component in the flue gas is in a vaporized state. The tar in the vaporized state cannot be captured by the electric tra...

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Problems solved by technology

[0003] 1. When 6 sets of cooling nozzles are put into operation at the same time, due to the large amount of cooling water, there is still more cooling water at the tail of the cooling tower that cannot be atomized, which causes water to be discharged from the tail of the cooling tower, which not only corrodes the pipes, but also pollutes the environment

[0004] 2. When the 6 groups of cooling nozzles are all out of operation, due to the sparks in the roasting dust collection flue gas, some sparks will be deposited on the surface of the cooling tower and the electric trap through the cooling tower and the electric trap, and a certain amount of sparks will be deposited It is easy to cause spontaneous combustion, which brings certain safety hazards to the operation of roasting

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