Category: Articles

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Packed bed scrubbers

The so-called packed bed, that is often used in air scrubbers, is a hollow tube or pipe filled with a specifically designed packing material. Packed beds are used to improve contact between different stages of a chemical reaction or another process that is similar in nature, for example, distillation processes or air scrubbing. The purpose...

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Flue gas desulphurisation uses and perspectives

In accordance with the environmental impact of power plants that run on certain challenging coal types flue gas desulphurisation (FGD) solutions need to be developed in order to achieve higher treatment quality and maximum operating efficiency. FGD technology is built on the chemical reaction that occurs between the warm exhaust gases and limestone. This reaction...

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Energy Related Air Pollution Problems

Air pollution is the fourth greatest overall risk factor for human health worldwide, with high blood pressure, dietary risks and smoking. Among the major air pollutants, fine particulate matter is the most damaging to human health, and sulfur oxides, nitrogen oxides, and ozone are associated with a range of illnesses. In addition to human health,...

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Air pollution control engineering

The phenomenon of air pollution includes a sequence of events: the generation of pollutants at and their release from a source; their transport and transformation in and removal from the atmosphere; and their effects on human beings, materials, and ecosystems. Generally, either economically infeasible or technically impossible to design processes for absolutely zero emissions of...

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Wet Scrubber Limitations

Wet scrubbers clean air by physically trapping PM on wet surfaces and absorbing gasses into the liquid. In some cases, the gasses react with chemicals in the liquid, too. Small liquid droplets are more effective per unit volume of scrubber liquid because they have more surface area than fewer, larger droplets. Very small liquid droplets,...

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Flue-gas desulfurization (FGD)

Since wet scrubbers vary greatly in complexity and method of operation, devising categories into which all of them neatly fit is extremely difficult. Scrubbers for particle collection are usually categorized by the gas-side pressure drop of the system. Gas-side pressure drop refers to the pressure difference or pressure drop, that occurs as the exhaust gas...

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Wet air scrubber replacement and retrofitting

Scrubber systems are a diverse group of air pollution control devices that can be used to remove some particulates and/or gasses from industrial exhaust streams. Power plants, steel mills, pharmaceutical producers, food manufacturers, chemical producers and other industrial companies often use baghouses to control emission of air pollutants. Unlike electrostatic precipitators, where performance may vary...

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Selecting the right equipment for dust control

Nowadays, in order to improve air quality, it is important for governments, industry and the public to understand the interconnected components of an air quality management system. Machines that will be used to minimize particulate matter incorporate electrostatic precipitators, dust cyclones, and wet scrubbers. One recent technology in air quality control systems, especially in wet...