Smoke secondary combustion furnace

Abstract

The invention belongs to the field of combustion furnaces, and particularly relates to a smoke secondary combustion furnace. At present, in the use process of an ordinary combustion furnace, the mainpollution is that in the fuel adding process of the combustion furnace, particularly relates to a civilian combustion furnace, when a fire coal is added and stirred, emission of smoke reaches the highest peak, the high emission duration of the smoke dust can be up to several minutes or even more than ten minutes, in this case, due to the hearth is in a smoldering state, so that the temperature ofthe hearth is lower than the internal temperature of the fire coal in the furnace, therefor, the smoke dust at the moment is difficult to burn out. According to the smoke secondary combustion furnace,smoke dust combusted in the hearth of the combustion furnace is introduced into a smoke preheater above a furnace grate in the hearth again through a chimney, the smoke preheater is always located inwrapping of the fire coal in the hearth, and therefore it can be guaranteed that the smoke preheater is always in a high-temperature state; when the oxygen-containing smoke dust passes through a preheating cavity of the smoke dust preheater, the oxygen-containing smoke dust is heated to be higher than the ignition point by a high temperature, the oxygen-containing smoke dust is combusted, and finally clean gas is discharged.

Description

[0001] Field [0002] The invention belongs to the field of combustion furnaces, in particular to a combustion furnace for secondary combustion of soot. Background technique [0003] At present, during the use of ordinary combustion furnaces, the main pollution lies in the fuel addition process of the combustion furnace. Especially for civil combustion furnaces, when the coal is added and stirred, the smoke and dust emissions reach the highest peak. The high emission of smoke and dust lasts for several minutes or even ten minutes. At this time, the furnace temperature is lower than the internal temperature of the coal in the furnace because it was in a smoldering state before, so it is difficult to burn out the smoke and dust at this time. After the coal is added, the coal is in a smoldering state, and the internal temperature of the coal in the furnace is higher than the space air temperature in the furnace. In some secondary combustion technologies, the smoke generated in...

AI Technical Summary

Problems solved by technology

Some secondary combustion technologies introduce the smoke and dust generated in the furnace through the chimney to the furnace for secondary combustion, but because the air temperature in the furnace is relatively low, the effect of secondary combustion is not ideal, and the smoke pollution after secondary combustion is still relatively serious

The present invention is designed for the defect of insufficient combustion existing in the current combustion furnace.

Images