A counterflow flue gas purification device and its purification unit

Abstract

The invention discloses a reverse-flow type flue gas purifying device and purifying units thereof. The reverse-flow type flue gas purifying device comprises at least two vertical purifying units, wherein each purifying unit comprises a purifying tower body, an activated carbon distribution system is arranged at the upper part of the purifying tower body and comprises downwards inclined main distribution pipes, branch distribution pipes with downward openings are arranged on the main distribution pipes, and the openings of all the branch distribution pipes are located in the same horizontal line; vertical discharge pipes are arranged between the main distribution pipes of the purifying tower bodies, discharge ends of the main distribution pipes of the top purifying unit and feed ends of the main distribution pipes of the rest purifying units are connected onto the discharge pipes, discharge systems are arranged at lower parts of the purifying tower bodies, each discharge system comprises a conical discharge hopper and a collection hopper arranged below the conical discharge hopper, and bottoms of the collection hoppers of previous purifying units are connected with discharge pipes fed into the collection hoppers of the next purifying units. The utilization rate of upper space of the purifying units is high, and bottom discharge uniformity is realized.

Description

technical field [0001] The invention relates to a flue gas purification system, in particular to a countercurrent flue gas purification device using activated carbon for desulfurization and denitrification and a purification unit thereof, belonging to the technical field of air pollutant purification equipment. Background technique [0002] With my SO 2 and NO x Emissions are gradually increasing, and the standards for flue gas emissions are getting higher and higher. At present, wet technology is mostly used in the field of flue gas purification. The wet desulfurization process not only consumes a lot of water resources, but also produces desulfurized gypsum that will cause secondary pollution to the surrounding environment. [0003] Activated carbon flue gas purification technology is a recyclable dry flue gas purification technology. At a temperature of 80-150 ° C, through the adsorption and catalysis of activated carbon, the SO in the flue gas 2 It reacts with water a...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a counter-flow flue gas purification device using activated carbon for desulfurization and denitrification, so as to solve the problems of active carbon distribution, uneven discharge and large floor area in the prior art flue gas purification device

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