Method and device for synergistically removing fine particles via wet-process flue gas desulfurization

Abstract

The invention provides a method and a device for synergistically removing fine particles via wet-process flue gas desulfurization, belonging to the technical field of control of fine particulate matters in smoke. The method is characterized by comprising the steps of simply reforming a desulfurization flue in a wet-process desulfurization device, establishing a steam phase change area to ensure that the fine particles condense and grow, establishing a collision condensation area to ensure that the fine particles further condense and grow, effectively capturing the condensed and grown fine particles by using a flue demister and discharging the fine particles out from an outlet of a flue. The device for realizing the method is characterized in that an outlet of an absorption tower is connected with an increasing coupling at the inlet end of the desulfurization flue, the outlet end of the desulfurization flue is connected with a reducing pipe at the outlet of the flue, and a smoke uniform distributor, a steam nozzle, a cleaning process water nozzle, a flue water collection port and the flue demister are arranged in sequence along the flow direction of the smoke. The method and the device have the beneficial effects of saving the equipment investment cost and having good fine particle removal effect through simply reforming the original facility.

Description

technical field [0001] The invention belongs to the technical field of fine particulate matter control in flue gas, and in particular relates to a method and device for wet flue gas desulfurization and collaborative removal of fine particulate matter. Background technique [0002] In the wet flue gas desulfurization (WFGD) process, on the one hand, the particulate matter in the flue gas can be synergistically removed by the washing effect of the desulfurization slurry; Fine particulate matter and SO in flue gas 2 The complex heterogeneous reaction process between such gaseous components may itself form PM with a diameter less than or equal to 2.5 microns 2.5 fine particles. while PM 2.5 Fine particles, although small in size, have a greater impact on human health and the quality of the atmospheric environment. In February 2012, the State Council agreed to release PM 2.5 Listed as one of the monitoring indicators. However, PM 2.5 The treatment effect is often poor. ...

AI Technical Summary

Problems solved by technology

However, this technology to promote the condensation and growth of fine particles in flue gas desulfurization usually needs to add a flue gas humidity adjustment chamber and a phase change condensation chamber to the existing flue gas wet desulfurization device. However, the steam in the phase change chamber and the flue gas containing fine particles Uneven mixing not only increases the cost of equipment, but also causes the fine particles to be directly carried away by the flue gas because a lot of water vapor fails to condense on the surface of the fine particles

Images