Flue gas desulfurization process for comprehensively utilizing hot waste gas of circulation cooler in sintering process

Abstract

The invention discloses a flue gas desulfurization process for comprehensively utilizing hot waste gas of a circulation cooler in a sintering process, which comprises two main steps of washing and dedusting sintering flue gas produced by a sintering machine and performing cyclical absorption and desulphurization by absorption liquid. Sintering ore produced by the sintering machine is cooled by the recirculation cooler, a desulphurization rich solution produced in the step of the cyclical absorption and desulphurization of the absorption liquid is recycled through a regeneration tower, low-temperature hot waste gas produced in a low-temperature region of the recirculation cooler is conveyed to the regeneration tower, and the low-temperature hot waste gas is utilized to heat and decompose the desulphurization rich solution in the regeneration tower. The flue gas desulfurization process fully makes use of the hot waste gas resource of the circulation cooler, has the advantages of less energy consumption, low cost, simple operation and the like, and can effectively reduce the occurrence of phenomenon of flue gas condensation.

Description

technical field [0001] The invention relates to a waste gas recovery and comprehensive utilization process, in particular to a waste gas treatment and comprehensive utilization process in the flue gas desulfurization process. Background technique [0002] Fuel (solid, gas) combustion and flue gas generated during iron ore sintering usually contain a large amount of sulfur dioxide. If the sulfur dioxide in the flue gas is not treated and discharged directly into the atmosphere, it is easy to form acid rain. Harmful to the growth of animals and plants and the living environment of human beings. [0003] Flue gas desulfurization technology is an important means to control sulfur dioxide pollution in the atmosphere, and has been commercially applied worldwide. With the development of science and technology and the continuous deepening of research, hundreds of flue gas desulfurization technologies have come out, mainly including limestone-gypsum method, rotary spray drying metho...

AI Technical Summary

Problems solved by technology

[0009] It can be seen from the above that the existing annular cooler has recycled the hot exhaust gas in the middle temperature zone and (sub) high temperature zone of the annular cooler, but the hot exhaust gas in the low temperature zone (below 200°C) produced in the annular cooler has not been recycled. , and directly discharged into the atmosphere, there is a waste of resources and energy, and it also has a negative impact on the atmospheric environment

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