Flue gas desulfurization and denitrification adsorption device for sintering machine

Abstract

The invention relates to a flue gas desulfurization and denitrification adsorption device for a sintering machine. The device comprises a chain bucket machine, a charging bucket, an adsorption tower, an ammonia gas supply unit and an activated carbon desorption tower, and the chain bucket machine is connected in series with the activated carbon desorption tower through the adsorption tower. The adsorption tower is composed of 2-6 desulfurization and denitrification units. The upper part of the chain bucket machine is connected with the charging bucket, and the charging bucket is connected to the lower part of the chain bucket machine through the desulfurization and denitrification units. Each desulfurization and denitrification unit is composed of a desulfurization module and a denitrification module, an activated carbon layer is arranged between the desulfurization module and the denitrification module, a flue gas transition area is arranged outside the adsorption tower, and the flue gas transition area is connected with the desulfurization module and the denitrification module. Each denitration module is provided with an ammonia gas inlet, and the ammonia gas inlet is connected with an ammonia gas supply unit. According to the invention, the activated carbon falls down at a constant speed in the adsorption tower, so that the adsorption time between the activated carbon and flue gas is prolonged, the contact area between the activated carbon and the flue gas is increased, the overall height of the adsorption tower is reduced, the desulfurization rate of the flue gas reaches 99%, and the denitration rate reaches 80%.

Description

technical field [0001] The invention belongs to the technical field of industrial waste gas treatment, and relates to flue gas treatment equipment, in particular to a sintering machine flue gas desulfurization and denitrification adsorption device. Background technique [0002] For industrial flue gas, especially for sintering machine flue gas in the iron and steel industry, flue gas desulfurization and denitrification technology is a flue gas purification technology applied to the chemical industry where multiple nitrogen oxides and sulfur oxides are generated. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution. Most of flue gas simultaneous desulfurization and denitrification technologies are currently in the research and industrial demonstration stage, but because it can simultaneously achieve desulfurization and denitrification in one system, especially with the X Control standards are becoming increasingly stringent, and desulfurization and ...

AI Technical Summary

Problems solved by technology

However, since the activated carbon in the adsorption tower adopts a vertical falling method to absorb SO in the flue gas 2 and NO X , so that the contact time between the activated carbon and the flue gas is short and the contact area is small. If the flue gas and the activated carbon are fully contacted, the SO in the flue gas 2 and NO X The adsorption tower must be built very high, but since the activated carbon is in a free fall in the adsorption tower and accelerates downward, it is difficult to prolong or control the contact time between the activated carbon and the delay no matter how high the adsorption tower is built.

[0004] At present, the method of controlling the falling time of activated carbon is widely used, and most of them use the outlet of activated carbon to make a shrinking funnel structure, but this structure can easily cause the problem of blockage of activated carbon at the outlet.

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