Novel dust settling chamber

Abstract

A dust depositing chamber system for depositing the dust contained in high-temp fume and burning the residual volatile components and carbon powder is composed of a fume inlet furnace chamber, a fume outlet furnace chamber, and a communication hole between said furnace chambers. It features that their internal surface is composed of a refractory layer and an insulating layer and said communication hole has a sleeve pipe made of steel.

Description

Technical field: [0001] The invention relates to a novel ash chamber for post-treatment of high-temperature flue gas in a rotary calciner of a carbon plant, and belongs to the technical field of ash chambers. Background technique: [0002] The ash chamber is the equipment used by the aluminum plant carbon plant behind the rotary calcining kiln. Its function is to settle the large particle dust in the high-temperature flue gas, the residual volatile matter and carbon powder in the combustion, and purify the environment. At present, the ash settling chamber in the prior art uses an intermediate damping partition wall in an independent furnace chamber to increase the residence time of the flue gas. The high-temperature flue gas entering the ash chamber from the kiln directly collides with the middle partition wall before flowing out from the flue outlet. The temperature of the flue gas is as high as 900°C (sometimes ~1250°C), and the pressure of the flue gas at the outlet of th...

AI Technical Summary

Problems solved by technology

At present, the ash settling chamber in the prior art uses an intermediate damping partition wall in an independent furnace chamber to increase the residence time of the flue gas. The high-temperature flue gas entering the ash chamber from the kiln directly collides with the middle partition wall before flowing out from the flue outlet. The temperature of the flue gas is as high as 900°C (sometimes ~1250°C), and the pressure of the flue gas at the outlet of the ash chamber is about -180°C. ~-80Pa, because the partition wall is impacted by high-temperature flue gas and affected by the temperature difference and pressure difference between the two sides, it is easy to cause deformation and collapse of the middle partition wall, and its service life is relatively short

Moreover, the existing ash chamber also has the disadvantages of being difficult to maintain and having a relatively high cost.

Therefore the use effect of existing ash chamber is still not ideal enough

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