Gravity settling chamber for monoammonium phosphate tail gas dustfall

Abstract

The invention relates to a gravity settling chamber for monoammonium phosphate tail gas dustfall. Retaining walls for partitioning the settling chamber into a plurality of gas chambers are arranged in the settling chamber in a longitudinal staggering manner; a gas flow channel leading to the gas chamber adjacent to each retaining wall is formed between one side of each retaining wall and the inner wall of the settling chamber; a longitudinal partition plate is arranged in the gas flow channel between the second retaining wall and the inner wall of the settling chamber and partitions the gas flow channel into an upper part and a lower part; a dust discharging opening is formed in the bottom of the tail end of the second gas chamber and is communicated with a dust gathering chamber arranged below the settling chamber through a pipeline; an electric sweeping device for sweeping dust settling to the bottoms of the gas chambers into the dust discharging opening is arranged in the second gas chamber at the upper end of the dust discharging opening. The longitudinal partition plates and transverse partition plates are arranged in the settling chamber, so that the dustfall effect can be enhanced.

Description

technical field [0001] The invention relates to a monoammonium phosphate tail gas dedusting device, in particular to a gravity settling chamber for monoammonium phosphate tail gas dedusting. Background technique [0002] The neutralization degree of ammonium phosphate slurry in the production of monoammonium phosphate plant is low (1.95-1.02), almost no ammonia escapes, and the main pollutant emitted by the drying tail gas is ammonium phosphate dust. Because the gas velocity in the tower of countercurrent drying is very low, the dust content of the tail gas coming out of the tower is very small. After the exhaust gas leaves the tower, it first passes through the impact-type exhaust gas gravity settling chamber, and most of the small amount of dust brought out is naturally settled by gravity, and then washed by the washing device and discharged into the atmosphere. Due to the continuous settling of dust in the settling chamber during production and operation, the air duct be...

AI Technical Summary

Problems solved by technology

Due to the continuous settling of dust in the settling chamber during production and operation, the air duct becomes narrow, and the airflow speed increases when the air intake volume remains unchanged, making it difficult for the dust in the exhaust gas to adhere, resulting in the dust content in the dry exhaust exhaust gas from the washing tower. High (average 90mg / m 3 ), even more than 120mg / m 3 , can not meet the requirements of "Comprehensive Emission Standard of Air Pollutants" (GB / 6297-96)

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