Gas Cleaning

Gas Scrubbers / Absorption Columns / Venturi Scrubbers / Fume Scrubbers

Gas Scrubbers

Begg Cousland have designed and supplied many gas scrubbers and absorber systems to a variety of chemical and process industries.

We design and supply Venturi Gas Scrubbers, Eductor Venturi Gas Scrubbers, Wet Cyclones, Packed Bed Scrubbers and Cross Flow Scrubbers using conventional tower and packing designs or tailoring new packings, such as BlueFil® structured mesh, to solve difficult problems. We can provide the optimum tower, absorber or distillation column for you.

Begg Cousland can design and supply all types of gas scrubbers, either as ‘end-of-pipe’ pollution control or as a gas cleaning stage within a process. Gas scrubbers are all designed to ensure a good contact and mixing between gas and liquid, usually for Absorption, Odour Control or Particulate removal. Desorption and Distillation are also mass transfers done in columns.

Typical applications for Begg Cousland Gas Scrubbers in industry include removal of caustic or acidic products such as hydrochloric acid, ammonia, fluorine and sulphuric acid from process exhaust gases. Removal of these harmful contaminants can lead to a reduction in general air pollution as well as reducing the impact of acid rain.  In the case of extremely harmful emissions, e.g. Chrome VI, we have the most efficient scrubbing technology and equipment for the job.

Below are the most common designs we supply:

A single stage, counter-current packed bed design removes gas by absorption or by chemical reaction. It is suitable for odour control also (see Packed Bed Gas Scrubber Fig 1).

A 2 stage counter-current design removes 2 different gases by absorption or by chemical reaction with different liquors with a dividing tray. Suitable for 1st stage ‘stripping’ and 2nd stage scrubbing duties in series (see Packed Bed Gas Scrubber Fig 2).

Cross Flow Scrubbers are very effective for fume capture, even if the fume is submicron in size and is sticky or extremely hazardous. BlueFil® mesh panels in a series of multiple stages, with tailored irrigation is a very high efficiency concept, using some or all of the thermoplastic mesh styles & sizes to reach the emission limit needed. (see Cross Flow Scrubber Fig. below) See the table below for some indications of combinations and efficiency.

Eductor Venturis are usually used where ‘sticky’ solids are present or where the high liquid flow can condense steam or generate suction (see Eductor Venturi Fig).

 

A high energy / high efficiency version of the Venturi uses a cyclone stage afterwards, and can remove 0.1 micron particles. It is not prone to blockage (see Venturi Fig 1). Alternatively, a packed bed stage can be used after the Venturi (see Venturi Fig 2).

Gas Scrubbers - Packed Bed gas scrubber - VENTURI ARRANGEMENTGas Scrubbers - arrangement options