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Design and application of wet scrubber

Views: 9     Author: China Xicheng     Publish Time: 2021-04-06      Origin: China Xicheng

Specific application of wet scrubber

The removal efficiency of wet scrubbers varies with each pollutant-solvent system and the type of absorber used. The removal efficiency of most absorbers exceeds 90%, and for certain pollutant-solvent systems, the efficiency of tower absorbers may exceed 99%. The typical collection efficiency range is 70% to greater than 99%. Particulate matter (PM) and hazardous air pollutants (HAP) in particulate form (PM HAP)-packed bed wet scrubbers are restricted to applications where dust loading is low, and the collection efficiency ranges from 50-95%, According to the application.

The operation mode of the packed bed scrubber removes air pollutants by reacting with the adsorbent or reagent slurry or absorbed into the liquid solvent through inertia or diffusion collision. The packed bed scrubber consists of a chamber that contains layers of packing materials (for example, spiral rings) of various shapes that provide a large surface area for liquid-particle contact.

The shape, weight, surface area, and cost of the filler will affect the low gas pressure drop and the efficiency of gas-liquid contact. The packing is fixed in place by a wire mesh holder and supported by a plate near the bottom of the scrubber. The exhaust gas is forced to enter the bottom of the scrubber chamber and flow through the packing vertically or horizontally. At the same time, the scrubbing liquid is uniformly introduced above the packing and flows down through the bed to cover the packing and form a film. In a vertical design (packed tower), the airflow flows up the chamber ("countercurrent" to the liquid). However, some packed beds are designed horizontally to allow gas to flow through the packing ("cross flow"). Then, the purified gas passes through a mist eliminator built into the top of the structure, and the waste slurry drops to the bottom of the chamber.

Design calculation of wet scrubber

The working principle of wet scrubber can refer to what is a wet scrubber. The design calculation of the wet scrubber, among them, let us start with the basic things, namely the collection/storage tank. Usually, the collection tank is nothing more than a container with water/caustic lye. I directly mentioned water/caustic lye because we usually use it in the pharmaceutical field. If the smoke inhaled by the blower is acidic, then we will use lye; if other than that, we will use it with water, the choice also depends on the solubility. The detailed calculation formula can refer to "Design Calculation of Scrubber".

What types of packing are used in the scrubber?

Usually, there may be many packages, but I only know three kinds: 1. Super intallox, 2. 2. intallox saddle, 3. Pall ring. 4. The content of the random package will again appear in sub-categories based on MOC, such as ceramics, metals, plastics, etc.

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