Multistage tube bundle type dust removal and frog removal device

Abstract

The invention discloses a multistage tube bundle type dust removal and frog removal device and belongs to the field of waste gas treatment. The device is arranged above a spraying layer in an absorption tower and comprises n stages of tube bundle type dust removal and frog removal devices from bottom to top, and a coagulation device is arranged between at least one group of the tube bundle type dust removal and frog removal devices which are connected; the coagulation device comprises an atomization pipeline, and a plurality of atomization nozzles are formed in the atomization pipeline. The multistage tube bundle type dust removal and frog removal device disclosed by the invention, by adding the coagulation device between different rotational flow component layers, improves the probability that inertial collision, interception and coagulation occur between small granular dust and sprayed-in coagulation liquid drops, the property of being collected of dust is improved, removal efficiency is improved at the same number of stages of rotational flow components, or the number of stages of the rotational flow components required for achieving the same efficiency is reduced, and investment and operation costs are reduced.

Description

technical field [0001] The invention belongs to the field of waste gas treatment, and in particular relates to a multi-stage tube bundle type dust and mist removal device. Background technique [0002] At present, the existing coal-fired units in my country generally adopt the limestone-gypsum wet flue gas desulfurization process. Limestone, gypsum slurry, etc. in the state of fog droplets. With the increasing national environmental protection emission standards, it is necessary to perform deep dust removal on the clean flue gas after desulfurization. According to the newly promulgated "Emission Standards of Air Pollutants for Thermal Power Plants", the dust concentration emitted by the chimney is proposed to be 5mg / m 3 requirements. [0003] Dust and fog removal of flue gas is the most common process in the flue gas purification process. There are various types, but it is difficult to deal with the saturated wet flue gas containing a large number of mist droplets. In orde...

AI Technical Summary

Problems solved by technology

[0005] This type of mist eliminator realizes the separation of droplets or particles by centrifugal force. When the load is low or the particle size is too small, the separation efficiency is poor because the centrifugal force is small or the centrifugal force is not enough to separate small particles, although it can Increase the number of demisters to achieve a certain removal efficiency, but the investment and operating costs have risen sharply, and even in some cases it is difficult to meet the emission requirements even if the number of demisters is increased

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