The invention discloses a venturi
pipe and applications thereof. The venturi
pipe comprises a contraction section, a
throat pipe, a
diffusion section and plural groups of liquid-phase spraying nozzlesarranged in parallel to the axial direction, wherein each group comprises two liquid-phase spraying nozzles with opposite spraying
nozzle directions, the two liquid-phase spraying nozzles are respectively arranged at the
tail end of the contraction section and the starting end of the
diffusion section, the starting end of the contraction section is a gas-phase inlet, the
tail end of the diffusionsection is a gas-liquid outlet, the liquid-phase inlet is arranged on the pipe wall of the contraction section and / or the
diffusion section, and the liquid-phase inlet is communicated with the liquid-phase spraying
nozzle through a pipeline. The venturi pipe provided by the invention is simple in structure and good in gas-liquid
mixing effect, has good application prospect in a gas-liquid
mass transfer process, and is particularly suitable for the fields of gas dust removal such as
flue gas desulfurization,
flue gas dust removal, cooling and the like.