Purification method of sulfur-containing tail gas of high-temperature furnace

Abstract

The invention discloses a purification method of sulfur-containing tail gas of a high-temperature furnace. The purification method comprises the following steps: a, introducing the sulfur-containing tail gas discharged from the high-temperature furnace into a first-grade purification system; neutralizing sulfur dioxide in the sulfur-containing tail gas in the first-grade purification system and removing the sulfur dioxide from the tail gas to obtain first-grade purified gas; b, introducing the first-grade purified gas into a second-grade purification system through a gas conveying pipe; neutralizing residual sulfur dioxide in the first-grade purified gas in the second-grade purification system and removing the sulfur dioxide from the tail gas to obtain second-grade purified gas; discharging the second-grade purified gas into the atmosphere through a draught fan. According to the purification method of the sulfur-containing tail gas of the high-temperature furnace, disclosed by the invention, the sulfur-containing tail gas is subjected to two times of purification by utilizing a system, and the effect of purifying the tail gas is good; the problem that the content of sulfur oxide inthe tail gas in a graphite purification process exceeds the standards can be radically solved, and the pollution to the atmosphere is reduced; the preparation method can help to establish an environment-friendly factory.

Description

technical field [0001] The invention relates to the field of environmental protection, in particular to a purification system for sulfur-containing tail gas of a high-temperature furnace. Background technique [0002] At present, during the production of expanded graphite, the expansion furnace produces excessive (even much higher than the national emission standards) sulfur oxides. Most expanded graphite manufacturers discharge the tail gas generated by the expansion furnace directly into the atmosphere, and the sulfur oxides will Pollution to the atmosphere near the factory. In order to reduce the pollution to the surrounding air environment, only a few enterprises have adopted heightening treatment for the tail gas discharged from the expansion furnace (over 15m in height). In essence, it really solves the problem that the content of sulfur oxide exceeds the standard. [0003] Therefore, it is an urgent technical problem in this field to provide a method for purifying su...

AI Technical Summary

Problems solved by technology

[0002] At present, during the production of expanded graphite, the expansion furnace produces excessive (even much higher than the national emission standards) sulfur oxides. Most expanded graphite manufacturers discharge the tail gas generated by the expansion furnace directly into the atmosphere, and the sulfur oxides will Pollution to the atmosphere near the factory. In order to reduce the pollution to the surrounding air environment, only a few enterprises have adopted heightening treatment for the tail gas discharged from the expansion furnace (over 15m in height). In essence, it really solves the problem that the content of sulfur oxide exceeds the standard