Thermal desorption method and device for activated carbon

Abstract

A thermal desorption method including waste heat utilization for activated carbon is disclosed. The method includes adsorbing sulfur oxides, nitrogen oxides and other pollutants through activated carbon in an activated carbon adsorption tower of a desulphurization and denitration device, allowing blast furnace gas or coke oven gas to flow through a gas heat exchanger to preheat the blast furnace gas or the coke oven gas, conveying the blast furnace gas or the coke oven gas to a combustion chamber of a heating furnace, combusting, allowing high-temperature hot wind G0 discharged from the combustion chamber to flow through a temperature adjusting zone at the tail of the heating furnace to adjust the temperature so that the high-temperature hot wind turns into cooled hot wind G1, conveying the G1 to a heating zone of a desorption column, desorbing the activated carbon through the hot wind G1, discharging hot wind G1' which is further cooled from the heating zone, and applying a part of the hot wind G1' to preheat the blast furnace gas or the coke oven gas in the gas heat exchanger. One part of cooling wind G2' discharged from a cooling zone of the desorption column is adopted for heating nitrogen adopted as a gas carrier and / or for evaporating acid preparing wastewater. A desorption device for the activated carbon is also provided.

Description

technical field

[0001] The present invention relates to the thermal analysis method and the device thereof that comprise the activated carbon that waste heat is used for preheating nitrogen, more particularly, the present invention relates to comprise activated carbon adsorption tower and desorption tower (or regeneration tower) dry desulfurization, denitrification device from The method that the heating gas (such as air or hot air) output from the analysis tower is used to heat the nitrogen carrier gas so as to realize the recovery and utilization of waste heat belongs to the field of sintering flue gas treatment. Background technique

[0002] For industrial flue gas, especially sintering machine flue gas in the iron and steel industry, it is ideal to use desulfurization and denitrification devices and processes including activated carbon adsorption towers and desorption towers. In the desulfurization and denitrification devices including activated carbon adsorption tower a...

Images