Function
Amongst others, especially the chemical industry requires complex gas treatment solutions for either production processes or emission control applications. The Compact & Laboratory Gas Scrubbers Series is designed for exactly these purposes. Compact Gas Scrubbers consist of a jet scrubber and, downstream, an absorption column. The jet scrubber operates according to the injection principle and therefore the gas scrubber as such does not cause any pressure loss but generates a pressure increase in the gas flow instead. The circulating scrubbing liquid serves as a motive medium and conveys the induced gas through the jet scrubber pipe. Therefore, when using a compact gas scrubber from GEA no mechanical fan is required for extracting and conveying the gases.
The Compact Gas Scrubbers from GEA are supplied in 6 standard sizes (CGS 5-50, 5-150, 50-230, 100-500, 300-1000, 800-1500) and 4 standard configurations (Jet Scrubber, Liquid Tank, Counter-current Column and Circulation Pumps). The modular concept allows easy expansion and adaptation to customer-specific requirements.
The GEA Laboratory Gas Scrubber is available in a smaller size.
Standard materials of construction are polyethylene (PE) or polypropylene (PP), which only differ by their applicable temperature range and their UV stability. PE and PP show already very good chemical stability and are preferred for ambient pressure and low temperature applications. For higher chemical or thermal stability requirements copolymers of e.g. ethylene/tetrafluoroethylene (ETFE) or tetrafluoroethylene perfluoralkoxyvinyl ethers (PFA) or even polytetrafluorethylene (PTFE) lining can be used. Combined with housing of either fiber reinforced plastics (FRP), carbon steel (CS) or various stainless steels (SS) / alloys a very high mechanical, thermal and chemical resistance of the construction can be realized.
They are mainly used for gas treatment in laboratories, pilot and production plants in the chemical and pharmaceutical industries.
Particular features
- Broad range of applications, flexible in use
- Self-extracting, no pressure loss
- Wide load range, efficient partial load behavior
- Easily combinable and expandable
- Available in almost all materials
- Resistant to fouling
- High reliability, low maintenance effort
- Compact design, low space requirement
- CE conformity according to European Machine Directive (2006/42/EC)
- Available in ATEX conform design, if required
Performance curve of the GEA Laboratory Gas Scrubber
Performance curves of the GEA Compact Gas Scrubbers (CGS)
Technical parameters of
GEA Laboratory Gas Scrubber and GEA Compact Gas Scrubber
| Type | Suction flow in m³/h | Liquid content in tank in l | Gas inlet diameter DN |
| Laboratory Gas Scrubber | max. 2,3 | 20 | 40 |
| Compact Gas Scrubber 5-50 | 5 - 50 | 100 | 50 |
| Compact Gas Scrubber 5-150 | 5 - 150 | 190 | 80 |
| Compact Gas Scrubber 50-230 | 50 - 230 | 400 | 100 |
| Compact Gas Scrubber 100-500 | 100 - 500 | 400 | 150 |
| Compact Gas Scrubber 300-1000 | 300 - 1000 | 1000 | 200 |
| Compact Gas Scrubber 800-1500 | 800 - 1500 | 1250 | 250 |
Working Principle
How do Compact & Laboratory Gas Scrubbers work?
A circulating scrubbing liquid serves as a motive medium and conveys the induced gas through the jet scrubber pipe where dust particles are wet, and a chemical reaction starts depending on the scrubbing liquid used.
The gas/droplet mixture is separated in a centrifugal separator which is arranged downstream. The latter is designed in such a way that the formation of foam is largely avoided. The droplets fall into the liquid supply tank from where it is recycled by means of a submergible or centrifugal pump.
In addition, the gas flows through a counter-flow scrubbing column arranged downstream which is provided with the scrubbing liquid from the circulation pump or with fresh scrubbing liquid if necessary.
According to requirements, a packed column, a tray column or a structured packing column can be used. Entrained liquid droplets are separated in a demister arranged downstream before the gas outlet. In special cases the jet scrubber can also be equipped with a quench for cooling of hot gas.
In special operating cases it is also required to separate aerosols. However, these aerosols can neither be effectively separated with a jet scrubber nor with a counter-current column. Therefore, if aerosols occur in the process, GEA can supply a suitable separator as downstream equipment.
The solution or reaction heat which occurs during the scrubbing process can be discharged either through the continuous addition of fresh liquid with the corresponding liquid overflow or through the installation of a cooler in the form of a plate heat exchanger.
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