Ongoing enhancements of current processes and procedures in environmental technology serve as a central focus for both operators and manufacturers. Wet air scrubbers continue to be the primary method for capturing and gathering particulates. Whether a wet or a dry system should be applied is determined by the particular characteristics of the dust in question: Venturi scrubber are better for small dust particles. They efficiently remove particulates from exhaust gases. This category of dust control technology belongs to the collection of air pollution controls collectively known as “wet scrubbers”. Venturi scrubbers are also known as Venturi jet scrubbers, gas-atomizing spray scrubbers, and ejector-venturi scrubbers. Properly designed and operated wet scrubbers are effective in removing many regulated heavy metal compounds and some acid gases with the help of special air treatment equipment. Scientists and engineers apply impingement trays or packed tower scrubbers for additional acid gas collection and also to subcool the gases after the removal of particulates from the gases through the use of Venturi scrubbers in their work. This minimizes the horsepower required by the induced draft fans. Venturi scrubbers have several advantages compared to other air pollution control equipment: they can handle high-temperature gas streams or gas streams that contain moisture. Venturi wet air scrubbers are small and can remove pollutant gases and particulates at the same time.

Venturi wet scrubbers are the most popular type of scrubbers; they have been used in the industry of air scrubbing for the past 35 years. They are highly efficient in collecting particles and in handling large inlet volumes at high temperatures.

A standard Venturi scrubber is a combination of a converging section with a throat (the narrowest part of the whole tube) and a diffuser. The mixture of dust and gas flows through the tube of the Venturi scrubber and reaches top speed in the throat section. This top speed drops again when the mixture passes into the diffuser. Intensive and concerted mixing takes place in the throat section between the gas and the liquid. Due to the high speed realized by the gas and liquid water is released into fine water droplets. The collection object in a typical Venturi scrubber is a liquid drop. The diameter of a liquid drop is a complicated function of velocity, liquid rate, and fluid properties. A centrifugal fan installed upstream (forced draft) or downstream (induced draft) provides the motive force to the gas stream carrying the PM (Particulate Matter). The gas is accelerated to the throat velocity in the converging inlet. After that, the gas passes through the throat where the PM encounters the liquid drops. Venturi scrubbers are compact: the droplet separator determines the dimensions of the installation. Separator may be larger than the scrubber itself.

Despite the popularity of Venturi scrubbers and their seemingly open and low-maintenance design, it is not devoid of construction flaws. One of them is the possibility of converging section corrosion due to a dry hot gas entering the scrubber. This can wear down the scrubber and cause a breakdown. To avoid that, cleaning liquid is introduced in the first section, instead of the second to cool down the air and stop dust particles from wearing down the surface of the scrubber.

Another problem that can occur is dust and particle collection on the venturi throat. This section is not easy to access, and if not cared for properly, can decrease venturi air scrubber efficiency and eventually lead to the breakdown. A solution to this problem is a dispersion of a cleaning liquid onto the surface of the throat to protect it from particle buildup.

A new type of wet air scrubber, multi-vortex wet air scrubber provides improved air treatment quality and can be used for both particle matter and gas collection. The treatment quality of multi-vortex wet air scrubber is generally 99.95-99.99% for both types of pollutants. Besides high efficiency, multi-vortex wet air scrubber possesses several advantages over conventional wet scrubbers – multi-vortex wet air scrubbers are compact, omnivorous, eco-friendly, economical, and low-maintenance.

If you are interested in purchasing multi-vortex wet air scrubber, please contact us at info@rdwd.tech