Four-layer reverse-flow type flue gas purification system

Abstract

The invention discloses a four-layer reverse-flow type flue gas purification system. Each layer of reverse-flow type flue gas purification device comprises a material distribution layer, a desulfurization adsorption layer and a discharging layer from top to bottom, wherein the material distribution layer is used for receiving an activated carbon feeding material and uniformly distributing activated carbon on the desulfurization adsorption layer; the desulfurization adsorption layer is used for carrying out desulfurization purification treatment on flue gas; and the discharging layer is used for collecting used activated carbon and discharging. Each layer of reverse-flow type flue gas purification device further comprises a feeding port, a discharging port, a gas inlet and a gas outlet, wherein the feeding port is formed above the material distribution layer; the discharging port is formed below the discharging layer; the gas inlet is formed below the desulfurization adsorption layer; and the gas outlet is formed above the desulfurization adsorption layer and below the material distribution layer. Two layers of desulfurization and denitrification of an adsorption tower for dry desulfurization and denitrification is changed into four layers of desulfurization, so that the filling amount of activated carbon is greatly reduced, the investment cost is reduced, meanwhile, the desulfurization treatment capacity is enhanced, and the occupied area of a purification system is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of air pollutant purification equipment, in particular to a four-layer counterflow flue gas purification system. Background technique [0002] The existing mainstream denitrification processes mainly include low-temperature SCR denitrification, medium-high temperature SCR denitrification, and activated carbon denitrification. [0003] Medium and high temperature SCR denitrification is generally combined with wet desulfurization, and is mainly used for desulfurization and denitrification of boilers. Medium-temperature SCR denitrification technology is mature, and the denitrification efficiency is high, which is an ideal denitrification method. However, the by-products of wet desulfurization are difficult to deal with. [0004] Low-temperature SCR denitrification is generally used in combination with baking soda or rotary spray desulfurization methods. The low-temperature SCR denitrification process is also ...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a four-layer counter-flow flue gas purification system to at least solve the problems of the current dry desulfurization and denitrification adsorption towers for some manufacturers’ dry desulfurization, such as the applicability of the transformation, discarding the activated carbon denitrification equipment, the The two-layer desulfurization and denitrification of the adsorption tower is changed to four-layer desulfurization, and only activated carbon desulfurization is performed instead of activated carbon denitrification, which greatly reduces the loading of activated carbon and reduces the cost of investment. At the same time, the enhanced desulfurization capacity will greatly reduce the occupation of the purification system. land area

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