High performance wet process dust removal desulfurizing unit with three spinning parts

Abstract

Three-rotation high-efficiency wet desulfurization dust collector. The utility model relates to an exhaust gas purification device for boiler flue gas desulfurization and dust removal. It includes the main tower with inner tower and flue gas outlet pipe, tangential flue gas inlet pipe, gray water and desulfurization slag outlet pipe, tangential chemical liquid nozzle, cyclone centrifugal dehydration device in the main tower, and water retaining ring , which is characterized in that: it sets a set of double-swirl flow guiding devices on the air flow channel under the swirl centrifugal dehydration device, which can make the air flow rise to the center and then centrifugal swirl, the device includes a centripetal flow guide column, The centrifugal diversion column and the inner hole between them, and the outlet end of the liquid medicine tube is arranged in the inner hole. The invention integrates a Venturi tube, a vortex device, a swirl device, and a dehydration and demisting device, and the gas-liquid ascending channel has a three-swirl process, which greatly increases the collision probability and reaction time, and its desulfurization efficiency is above 95%. Higher than 99.7%, dust concentration less than 40mg / m 3 , in line with the new environmental protection standard for smoke exhaust, and occupies a small area.

Description

technical field [0001] The invention relates to a device for purifying exhaust gas, especially for desulfurization and dust removal of boiler flue gas. Background technique [0002] Chinese patent 98219685.7 discloses a wet-process high-efficiency desulfurization and dust removal device, which includes a main tower with a central inner tower and a Venturi tower connected by a horizontal pipe, and tangential liquid flow nozzles are installed on the walls of the two towers, and The center inner tower is equipped with a cyclone. It improves the effect of flue gas desulfurization and dust removal by the flow of liquid and gas in the same direction, simplifies the structure of the equipment, reduces the consumption of liquid medicine and the resistance drop of fluid flow, but it also has the following disadvantages: 1) The The double-tower structure of the main tower and Venturi tower adopted by the device needs to occupy a large area and space, and the resistance drop of the fl...

AI Technical Summary

Problems solved by technology

It improves the effect of flue gas desulfurization and dust removal by the flow of liquid and gas in the same direction, simplifies the structure of the equipment, reduces the consumption of liquid medicine and the resistance drop of fluid flow, but it also has the following disadvantages: 1) The The double-tower structure of the main tower and Venturi tower adopted by the device needs to occupy a large area and space, and the resistance drop of the fluid in the tower is also relatively large; 2) its main tower is a straight circular cylinder, and the flue gas and After the chemical liquid enters from the tangential opening of the tower wall, desulfurization and dust removal are carried out in the swirl layer. Due to the lack of radial cross-mixing of the fluid in the swirl layer, the desulfurization reaction is not sufficient; 3) There is no drug in the central area of ​​the main tower Liquid replenishment, there is obvious lack of liquid medicine, and the mist is concentrated in the center of the main tower when the fluid rotates, it is difficult to be removed as it rises with the airflow, so it will affect the desulfurization and dust removal effect and the dryness of the exhaust gas

But it still has the following disadvantages: the radial collision range of gas and liquid in the center of the main tower is relatively narrow and the time is short, so the effect of desulfurization and dust removal may be further improved

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