Venturi lọc khí lọc khí ẩm ướt có sử dụng một sự thay đổi vận tốc khí để cắt dòng chất lỏng (thường là nước) thành những giọt mục tiêu nhỏ xíu vào đó các hạt và các khí hoà tan được chuyển giao. Chúng được coi là một Workhorse của các công nghệ kiểm soát không ô nhiễm cho chi phí vốn thấp, độ tin cậy, và hiệu quả trên nhiều ứng dụng. Họ có xu hướng sử dụng nhiều năng lượng hơn so với thiết kế thay thế đặc biệt trên các ứng dụng điều trị trên . | chapter 19 Venturi scrubbers Device type Venturi scrubbers are wet scrubbers that use a change in gas velocity to shear liquid streams usually water into tiny target droplets into which particulate and soluble gases are transferred. They are considered as a workhorse of the available air pollution control technologies given their low capital cost reliability and effectiveness on a variety of applications. They tend to use more energy than alternative designs particularly on applications treating over 50 000 acfm of gases. Venturi scrubbers are used where the collected product can be handled wet. They are often used on processes such as calciners and dryers wherein the blowdown from the scrubber can be returned to a wet portion of the process. They can also handle the heavy dust loadings which can occur from these sources. Venturi scrubbers can ingest dust loadings of over 30 grs dscf if designed correctly. Figure shows a rectangular throat Venturi scrubber a workhorse of the wet scrubbing industry. Typical applications Venturi scrubbers are best used to remove particulate pm aerodynamic diameter and larger where the gas flow is from 1 to 500 000 acfm if the particles are 10 pm and larger and from 1 to 50 000 acfm if the particles are pm and larger. They have been successfully used however to remove submicron particulate at pressure drops of up to about 60 inches water column. If the gas stream has primarily submicron particulate say from a hazardous waste incinerator a condensing wet scrubbing system or a wet electrostatic precipitator or similar lower energy input system might be used instead. There are literally hundreds of applications however in which the particulate is 1 to 20 pm diameter where the Venturi scrubber provides excellent results. The result is that thousands of Venturi scrubbers are in daily use throughout the world. 2002 by CRC Press LLC Figure Venturi scrubber Bionomic Industries Inc. . Rectangular throat Venturis are commonly
