Industrial tail gas treatment multi-cycle adsorption tower

Abstract

The invention relates to an industrial tail gas treatment multi-cycle adsorption tower which comprises a plurality of tower bodies arranged side by side, each tower body comprises an active coke feeding section, at least two flue gas purification sections and an active coke discharging section which are sequentially arranged from top to bottom, the flue gas purification sections in each tower body are the same in number and at least two, and a transition sealing section is arranged between two adjacent flue gas purification sections on the same tower body; a gas inlet pipe and a gas outlet pipe are respectively arranged at the lower part and the upper part of each flue gas purification section; the gas outlet pipe of one flue gas purification section is connected with the gas inlet pipe of another corresponding flue gas purification section at the same height of other tower bodies or the gas inlet pipe of the adjacent flue gas purification section above the same tower body; and the gas inlet pipe of the flue gas purification section at the bottom is the gas inlet pipe of the adsorption tower, and the gas outlet pipe of the flue gas purification section at the top is the gas outlet pipe of the adsorption tower. The adsorption tower improves the utilization rate of active coke in the adsorption tower.

Description

technical field [0001] The invention relates to a multi-cycle adsorption tower for industrial tail gas treatment, which belongs to the technical field of industrial tail gas purification. Background technique [0002] As a dry flue gas treatment technology, the activated coke industrial tail gas integrated purification process can simultaneously remove sulfur dioxide, nitrogen oxides, dioxins, heavy metals and other pollutants in the flue gas, and has desulfurization by-products that can be recycled Utilization, does not consume water resources, does not cause secondary pollution such as waste water and waste gas, etc. In this technology, the adsorption tower is the core equipment for removing pollutants. Due to the influence of structural design and flue gas flow characteristics of the existing adsorption tower, the distribution of flue gas in the tower is uneven, and local active coke does not participate in flue gas purification or has a low degree of participation. , th...

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Problems solved by technology

In this technology, the adsorption tower is the core equipment for removing pollutants. Due to the influence of structural design and flue gas flow characteristics of the existing adsorption tower, the distribution of flue gas in the tower is uneven, and local active coke does not participate in flue gas purification or has a low degree of participation. , the active coke cannot be effectively used and the loss increases. In addition, the local part of the tower is prone to rapid temperature rise. A large amount of protective gas nitrogen needs to be introduced into the tower and cannot quickly act on high-temperature parts, which will cause fire hazards.

The denitrification of the adsorption tower is the first-level ammonia injection or the second-level ammonia injection. On the one hand, the denitrification rate of this process is not high, and there is still a certain amount of nitrogen oxides in the flue gas after purification. On the other hand, excessive injection of ammonia gas will cause ammonia to escape, which will cause air pollution

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