A flue gas purification device for improving the utilization rate of waste heat and denitration rate and using method thereof

Abstract

According to a trend of flue gas, the flue gas purification device for improving waste heat utilization rate and denitration rate includes a primary adsorption column and a secondary adsorption columndisposed downstream the primary adsorption column. An original flue gas conveying pipeline is connected to a flue gas inlet of the primary adsorption column; a flue gas outlet of the primary adsorption column is connected to a flue gas inlet of the secondary adsorption column through a first pipeline; the device further comprises an analytical tower; a heating section and a cooling section are disposed on the analytical tower; the lower part of the heating section is provided with a heating section gas inlet, and the upper part of the heating section is provided with a heating section gas outlet; and the heating section gas outlet of the analytical tower is connected to the flue gas inlet of the secondary adsorption column by a second pipeline. The device introduces a part of exhausted hot air after heat exchange with to-be-analyzed activated carbon into the flue gas inlet of the secondary adsorption column, and on one hand, the concentration of exhausted SO<2> is removed, and simultaneously flue gas at the inlet of the secondary adsorption column is heated to improve the temperature of the flue gas.

Description

technical field [0001] The invention relates to an activated carbon flue gas purification device and the purification thereof, in particular to a flue gas purification device for improving waste heat utilization rate and denitrification rate, and belongs to the field of flue gas purification treatment. Background technique [0002] The discharge temperature of sintering flue gas is between 110-170°C, which contains SO 2 , NO x , dust, dioxins, heavy metals and other pollutants, and the activated carbon flue gas purification technology is just suitable for the sintering flue gas temperature emission range, which can realize the synergistic and efficient purification of multiple pollutants, and can simultaneously remove a variety of pollutants on a set of equipment Pollutants, achieving by-product SO 2 The utilization of resources, and this technology has the advantages of high pollutant removal efficiency, basically no consumption of water resources, and no secondary pollut...

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Problems solved by technology

It can be seen that SRG gas has a large water content, high temperature, and high-temperature and high-corrosion properties. Therefore, the acid production process is made of glass fiber reinforced plastic. The glass fiber reinforced plastic material has high temperature requirements, and generally requires operation below 100 ° C. It will cause the following adverse effects: (1) In order to deal with the pollutants in SRG, a large amount of water is consumed, resulting in waste of resources; (2) Due to the large specific heat capacity of water, in order to process SRG gas in the acid system made of glass fiber reinforced plastics, it must be Water is added to the SRG gas to achieve the purpose of cooling. Due to the heavy moisture content, the temperature after cooling is relatively high, which affects the life of the FRP material; (3) A large amount of process wastewater is generated

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