{"id":12540,"date":"2025-04-15T17:44:27","date_gmt":"2025-04-15T15:44:27","guid":{"rendered":"https:\/\/quimipol.com\/como-funciona-un-lavador-de-gases-paso-a-paso\/"},"modified":"2025-10-22T21:43:33","modified_gmt":"2025-10-22T19:43:33","slug":"how-a-gas-scrubber-works-step-by-step","status":"publish","type":"post","link":"https:\/\/quimipol.com\/en\/how-a-gas-scrubber-works-step-by-step\/","title":{"rendered":"How a gas scrubber works: step by step"},"content":{"rendered":"

At Quimipol we design, manufacture and install \u00a0high-efficiency gas scrubbers<\/a><\/strong> for the purification of industrial emissions.<\/h2>\n

Also known as scrubbers<\/strong> <\/a>or washing towers<\/strong><\/a>, these equipment are essential to ensure that industrial processes comply with the most demanding environmental regulations. But how exactly does a gas scrubber work? We explain it step by step.<\/h3>\n

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    Ingress of contaminated gas<\/strong><\/h3>\n<\/li>\n<\/ol>\n

    The process begins at the base of the gas scrubber<\/a><\/strong>, where the contaminated air flow is introduced. This gas usually comes from industrial processes such as chemical reactions, combustion or heat treatments<\/strong>, and can contain harmful substances such as hydrogen chloride (HCl),<\/strong> sulphur dioxide (SO\u2082)<\/strong> or organic vapours<\/strong> (VOCs).<\/p>\n

    The design of the inlet system is optimized to ensure a constant and uniform flow<\/strong>, allowing the gas to rise in a controlled manner through the interior of the scrubber.<\/p>\n

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      Fill bed<\/strong><\/h3>\n<\/li>\n<\/ol>\n

      Once the gas begins to rise inside the washer, it passes through the so-called filler bed<\/strong>, made up of technical elements known as Pall rings<\/strong>. These rings are specially designed to maximise contact between the gas and the washing liquid<\/strong>, which is key to efficient purification.<\/p>\n

      Thanks to their open structure and large specific surface area<\/strong>, Pall rings divide the gas flow into multiple streams, facilitating a homogeneous distribution. This design allows continuous contact between the two phases (gas and liquid) and avoids common problems such as bed clogging, even under demanding working conditions.<\/p>\n

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        Spraying the washing liquid<\/strong><\/h3>\n<\/li>\n<\/ol>\n

        At the top of the gas scrubber is the spray system<\/strong>, which consists of a network of distribution nozzles<\/strong> that are responsible for applying the washing liquid<\/strong> evenly to the filling bed.<\/p>\n

        This liquid can be simply water<\/strong>, in the case of soluble contaminants, or a neutralizing chemical solution<\/strong> such as sodium hydroxide (NaOH)<\/strong> or lime milk<\/strong>, if the gas contains acidic or more aggressive components.<\/p>\n

        When it falls on the Pall rings, the liquid coats its surface forming a thin liquid film<\/strong>, ready to capture, dissolve or neutralize<\/strong> the contaminants present in the gas as it ascends the tower.<\/p>\n

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          Reaction and absorption of pollutants<\/strong><\/h3>\n<\/li>\n<\/ol>\n

          At this point, the main action of the gas scrubber<\/a> occurs<\/strong>: the capture and elimination of pollutants<\/strong>. As the gas rises and comes into contact with the liquid film that covers the Pall rings<\/strong>, a chemical or physical exchange occurs between the two phases.<\/p>\n

          Depending on the type of contaminant, the mechanism may vary:<\/p>\n