Venturi Scrubber

venturi scrubber
A Venturi tube consists of a constriction, a throat, and a divergence. After the dust-laden gas enters the contraction section, the flow velocity increases and reaches the maximum value when it enters the throat. The washing liquid is added from the constriction section or the throat pipe, the relative flow velocity between the gas and liquid phases is very high, the liquid droplets are atomized under the high-speed air flow, the gas humidity reaches saturation, and the dust particles are wetted by water. Vigorous collision and agglomeration between dust particles and liquid droplets or dust particles. In the diffusion section, the gas-liquid velocity decreases, the pressure rises, and the condensation of dust particles as condensation nuclei is accelerated, condensing into dusty droplets with larger diameters, and then being trapped in the demister.
There are many types of Venturi tube configurations. According to the cross-sectional shape, it can be divided into two types: circular and square; according to the adjustability of the throat diameter, it can be divided into two types: adjustable and fixed; according to the liquid atomization method, it can be divided into pre-atomization type and non-atomization type; Water supply methods can be divided into four categories: radial internal spray, radial external spray, axial water spray and overflow water supply. It is suitable for removing dust particles with a particle size of 0.1-100μm, with a dust removal efficiency of 80-99%, a pressure loss range of 1.0-9.0kPa, and a liquid-gas ratio range of 0.3-1.5L/m3. It has a good cooling effect on high-temperature gas, and is widely used for dust removal and cooling of high-temperature flue gas, and can also be used as a gas absorber.