Vortical turbulent washer
Shushlyakov A.V., Shushlyakov D.A., Kirichenko L.V.
The given equipment is intended for complex clearing of gases of impurities and can be used in different industries, such as the food, chemical and by-product-coking industry, ferrous and nonferrous metallurgy and at other objects except those at which can be formed the impurities that in contact with water are capable to create dangerously fire and explosive mixes.
Vortical turbulent washers (then the VTW) are developed and investigated at the Kharkov national university of construction and architecture (KNUCEA); they are introduced and successfully operate at several factories of Ukraine already more than 5 years without repair. Experimental researches have shown high technical and economic characteristics of the VTW: efficiency of clearing of gases from the weighed impurities (including from a fine-dispersed dust) has made 99,9 %, efficiency of clearing of gases from water-soluble gases (such as SO2, CO, CO2, HF, HCl, etc.) - 94-97 % using pure tap water and more at use of absorbents.
On a design the device has small dimensions, and can be calculated under any productivity. Hydraulic resistance makes less than 1 kPa. The consumption of recharging water on gas clearing in the VTW 10 times less than the expense of water on clearing of gas by means of scrubbers. Under the shown characteristics it is possible to consider the VTW competitive in comparison with other devices of wet clearing of gases.
High efficiency of clearing of gas is reached at the expense of an internal recirculation of a liquid, the factor of an irrigation of cleared gas makes about 30 l to 1 м3 of gas.
Vortical turbulent washers are represented in photos:
Fig. 1. A vortical turbulent washer
Fig. 2. A vortical turbulent washer
The working principle of the device consists in the following: cleared gas arrives to clearing in inlet fitting through which it gets to the distributive chamber; from the distributive chamber gas, passing through whirler channels, twists and gets to the working chamber where, rotating, part of the gas falls to the bunker. Before device starts working the bunker must be filled with water. The rotating stream of the gas which has fallen to the bunker grasps with itself a part of a liquid and transfers to the working chamber, where the liquid is dispergated on drops and while rotating forms a cylindrical dripping-granular layer. Gas arriving on clearing is filtered through this layer that provides high efficiency of gases clearing process.
By accumulation of a liquid in the working chamber for more than critical mass its part, together with gas by radial stream is thrown off in the bunker where the slime drops out in a sediment, and the liquid goes on a recirculation.
Liquid rotation over the motionless basis of the bunker promotes concentration of impurities in the central part, therefore removal of a slime from the bunker is carried out completely without sticking of the caught impurities to a bottom or a bunker wall.
Fig. 3. The scheme of the VTW
High efficiency of clearing is reached at the expense of high relative speed of drops and a gas-dust stream, and also at the expense of the big surface of contact between liquid and gas-dust stream.
The given equipment is expedient for applying in many industries to clearing of gases of the weighed impurities and water-soluble gases.