Integrated type system for cooling, dewatering and demisting flue gas through ammonia desulphurization

Abstract

The invention relates to an integrated type system for cooling, dewatering and demisting flue gas, which is applicable to flue-gas treatment of an ammonia-process desulfurization system and belongs to environmental protection equipment. The integrated type system comprises a concentrating tower, an absorbing tower, a connecting flue, a first-stage dewatering and air-distributing device, a second-stage demisting device and an outlet demister, wherein the connecting flue is internally provided with the first-stage dewatering and air-distributing device and the second-stage demisting device; the first-stage dewatering and air-distributing device is positioned at the connecting position of the concentrating tower and the connecting flue; the second-stage demisting device is positioned at the middle part of the connecting flue. The outlet demister is positioned below an outlet of the absorbing tower. The integrated type system has the advantages that a staged removing mode of first dewatering and second demisting is adopted for flue gas, so that the removal and the returning of liquid drops carried by the flue gas are realized; due to the first-stage dewatering and air-distributing device, the impact of the airflow is reduced and the blocking of the second-stage demisting device is reduced; due to the outlet demister, the loss of process water is reduced, and the secondary pollution to air is reduced; the design is reasonable, the installation and the maintenance are convenient, the removing rate of liquid drops is high, the inspection period of the system is prolonged, and the synchronization rate of the desulfurization system is increased.

Description

technical field [0001] The invention relates to an integrated system for cooling, dewatering and fogging the ammonia desulfurization flue gas, which is suitable for the flue gas treatment of the ammonia desulfurization system and belongs to the environmental protection equipment category. Background technique [0002] In the wet double-tower desulfurization system, the flue gas enters the concentration tower first, and then enters the absorption tower. There is a connecting flue between the two towers, and a demister is installed to prevent the water droplets in the external flue gas from entering the absorption tower. tower. However, in actual operation, due to the high dust content of the slurry in the concentration tower, the specific gravity is relatively high. Blockage and collapse of the mist eliminator occur frequently, and in severe cases, the dewatering effect will be poor. The occurrence of these situations not only shortens the maintenance cycle of the desulfuri...

AI Technical Summary

Problems solved by technology

[0003] In view of the above existing problems, the purpose of the present invention is to solve the problem of blockage and collapse of the mist eliminator and the liquid droplets carried by the flue gas at the outlet, and provide an integrated system for cooling, water and mist removal of flue gas from ammonia desulfurization

Images