Venturi scrubbers are wet scrubbers used to collect fine or coarse particulate matter from hazardous, corrosive or volatile gas streams. They can recycle solid or valuable materials and offer a collection efficiency of up to 98.5%. They are not suitable for particles smaller than 0.00002 inch and cloud chamber scrubbers are more efficient for these. Manufacturers produce venturi scrubbers with a cooling section for high-temperature gas streams and can create custom systems for flows up to 300,000 cubic feet per minute.
A venturi scrubber is a type of wet scrubber designed to scrub gases. Even solid or valuable materials contained in high concentrations in the sludge can be recycled using Venturi scrubbers. They are used to collect fine or coarse particulate matter, which includes particles less than 0.00004 inch (0.001 mm) in diameter that are high in moisture or sticky. To ensure proper operation, a venturi scrubber must be designed with care.
A converging section, diverging section, and throat section make up the main sections of the traditional venturi scrubber. As the dirty gas is forced through the converging section and throat of the system, the gas collides with the scrubbing water. Through diffusion and impact, water droplets can capture some particles contained in the gases. At the end of this process, the dirty water is discharged into a recycling tank.
These devices are widely employed in various industries involved in chemical processing. They are very effective at removing fine particles from hazardous, corrosive or volatile gas streams. These scrubbers can also be used to reduce particles in industrial gas streams and gas streams that contain hard-to-handle solid materials.
A venturi scrubber can offer a collection efficiency of between 95 and 98.5%, depending on whether a three-, four- or five-stage scrubber is employed. Five-stage systems generally offer higher collection efficiency rates. Because they are continuously wet, venturi systems are not prone to clogging, scaling or clogging.
Processing a high particulate matter below 0.00002 inch (0.0005 millimeter) involves a pressure drop and a lot of energy. Venturi scrubbers can be inefficient devices for collecting particles smaller than this diameter. For applications involving these ultrafine particles, a cloud chamber scrubber is more efficient than a venturi scrubber. A cloud chamber scrubber is also associated with a lower operating cost.
Many manufacturers produce venturi scrubbers that have a cooling section, designed to accommodate high temperature gas streams. High-temperature gas streams include gas streams from glassmaking, melting, sintering, and incineration. Manufacturers make venturi scrubber models that can accommodate horizontal or vertical scroll outlets. They can create a custom venturi system with the capacity to handle flows up to 300,000 cubic feet per minute (8,495 cubic meters per minute).
Several manufacturers make venturi scrubbers featuring a compact design and horizontal venturi sections. The grooves can be fixed or adjustable and are equipped with multiple or single blades. Water can be injected into many venturi scrubber systems via spray nozzles. To minimize wear, flooded elbow inlets can also be fitted to these systems.
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