Ring-type baking furnace for carbon production

Abstract

The present invention discloses a ring-type baking furnace for carbon production. According to the ring-type baking furnace, a plurality of furnace chambers are subjected to head-tail connection combination to form a ring; a material box (4) and a fire channel (5) are separately arranged; the upper portion of the preheat furnace chamber material box (4) is provided with a furnace cover (1); a volatilization component pipeline (3) is arranged between the two rows of the furnace chambers; the upper portion of a heat furnace chamber is provided with volatilization component combustion frames (2); the furnace cover (1) and the volatilization component combustion frames (2) are connected with the volatilization component pipeline (3); the volatilization component combustion frame (2) is connected with the fire channel (5) of the heat furnace chamber; the furnace cover (1) is provided with asphalt volatilization component discharge ports; and furnace cover volatilization component discharge ports and inlets of the volatilization component combustion frames (2) are connected through the volatilization component pipeline (3). With the present invention, the condition that harmful asphalt volatilization components enter baking flue gas so as to cause pollution can be avoided, baking energy consumption can be reduced, benzopyrene can be effectively treated, a clean production purpose can be achieved, and the condition that the too high temperature at the preheat stage causes the baking product to generate cracks can further be avoided.

Description

technical field [0001] The invention relates to a ring type roasting furnace for carbon production. Background technique [0002] In the carbon industry at home and abroad, carbon products are generally roasted in an open ring roaster and a covered ring roaster. The volatile components of pitch in both furnace types enter the roasting flue gas during the preheating stage. On the one hand, the flue temperature in the preheating furnace chamber is low, and the volatile components cannot be fully burned. On the other hand, the roasting of some products (such as cathodes and electrodes) requires strict control of the temperature in the preheating furnace chamber, and a large amount of volatile components are not allowed to burn, resulting in a large amount The volatile matter is discharged out of the roaster along with the flue gas. [0003] The main harmful components of asphalt volatiles are tar, benzopyrene, and carbon dust. At present, the method of cooling tower + electri...

AI Technical Summary

Problems solved by technology

At present, the method of cooling tower + electric tar catcher is mainly used in China to treat flue gas. The equipment is huge and the investment is high. Although the tar and dust in the flue gas can be discharged up to the standard, it has little effect on the treatment of benzopyrene and cannot meet the national emission requirements. Standard requirements, and the collected tar contains a lot of water and dust, which is not easy to recycle and is discarded by many enterprises, causing secondary pollution

Benzopyrene is a carcinogen. Studies have shown that it can only be treated by incineration. The incineration temperature must be above 800°C. Due to the large flow rate and low temperature of the roasting flue gas, a large amount of fuel must be consumed to incinerate the flue gas. No carbon company has taken measures to control the benzopyrene in the flue gas of the annular furnace. Therefore, the excessive emission of benzopyrene in the flue gas of the annular roaster is very common

In addition, the method of cooling tower + electric tar collector cannot completely capture tar. As time goes by, tar will inevitably be deposited on the flue gas pipe, induced draft fan and the bottom of the chimney, resulting in pipe blockage and induced draft fan loss of balance. Even accidents of spontaneous combustion of tar also occur from time to time, and there are certain potential safety hazards

Images