Gas Cleaning Systems
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Wiegand® Gas Scrubbing Plants for Process and Environmental Technology Process and flue gas scrubbing, particle separation, gas cooling engineering for a better world

Gas scrubbing plants for process and environmental technology Our scope of delivery starts with engineering and ends up with delivery and commissioning of complete plants just upon your request. Quality and reliability are essential factors of the company. Certification according to well-established standards such as DIN ISO 9001 and ASME U Stamp are therefore a matter of course. You may contact us through our sales network with specialized engineers in more than 80 countries on every continent worldwide. GEA Wiegand is a worldwide leading company for process technology. We deliver gas...

We have developed gas scrubbers in compact design for gas quantities of up to 2,000 m3/h: This brochure presents some of the most important applications: Flue gas cleaning Laboratory gas scrubber LGW 40, LGW 50 and LGW 80 Compact gas scrubber KGW For more than 40 years we have been designing, constructing and supplying gas scrubbers for diverse areas of application, ranging from single components to complete exhaust gas cleaning plants with integral control systems. In our laboratory we have extensive mobile testing equipment and the necessary analysis and measuring instruments thereby...

Left: hot gas quench Right: Quench with jet scrubber and packing tower arranged downstream for flue gases with an inlet temperature of 1,300 °C, capacity: 14,900 m3/h Waste from chemical processes and production plants and also sewage sludge is often disposed of through incineration. The exhaust gases which are thereby produced with temperatures up to 1,300 ºC contain, among other things, halogenated carbon-hydrogen and heavy metals. This means that exhaust gases from incineration have to be cleaned to comply with the permitted emission limits. For many years GEA Wiegand has successfully...

Cleaning of process exhaust gas GEA Wiegand jet scrubbing plants are perfectly suited to the cleaning of exhaust air from chemical reaction processes, production buildings, container de-aeration, tank wagon emptying. As with all wet scrubbing units, these jet scrubbing plants circulate the scrubbing liquid. However, the jet scrubber, which operates according to the ejector principle, causes no pressure loss; instead it generates a pressure gain in the gas flow so that the need to use a ventilator is often eliminated. Additional packing or trays are installed into the scrubber’s separator as...

Dust separation with jet and Venturi scrubbers Besides harmful gaseous substances, the exhaust gases which require treatment often contain solid particles, which have to be cleaned to meet emission limit regulations. It is necessary to know the size distribution of the particles in order to choose the most suitable equipment. ditioned (through partial condensation of the water vapour content or water injection by means of high pressure or dual material nozzles), particles from approx. 0.5 µm upwards can be separated. For particle sizes larger than approx. 4.0 µm, jet scrubbers can achieve a...

Gas cooling Jet scrubbers are like spray coolers and are therefore particularly suited to applications where large quantities of hot, dust-laden gas have to be cooled. Both units have no parts which are susceptible to rapid fouling, they operate in combination, without pressure loss and adapt very easily to large fluctuations in load. GEA Wiegand supplies jet scrubbers as gas coolers For pre-cooling and inter-cooling in compression units For the simultaneous quenching and absorption of large quantities of harmful gases. 2-effect gas scrubbing plant for cooling and cleaning flare gas ,...

Lefthand fig.: Chloric gas absorption plant for cleaning exhaust air from chlor-alkali electrolysis and for the production of chlorine bleaching Righthand fig.: Turn-key jet scrubbing plant made of titanium and fibre-glass reinforced epoxy resin for the absorption of 25,000 kg/h chlorine in a chlorine factory. Absorption rate: 98 % In the production of chlorine all the resulting emissions including those from possible breakdowns must be collected together and conveyed to a gas cleaning system. Therefore, an absorption plant is an essential part of the standard equipment. In general terms,...

Scrubbers as emergency units In order to prevent accidents caused by escapes of chlorine from leaking storage containers or dosing plants, GEA Wiegand have developed chlorine emergency units, which operate according to the principle of the jet scrubbers. They are able, in the event of an accident, to suck up the environmental air without using a mechanical ventilator, to chemically bind the chlorine into the scrubbing liquor (usually caustic soda) and to reintroduce the cleaned air into the environment. For the purpose of room atmosphere suction there are 5 ready-to-connect standard sizes...

Compact gas scrubbers for gas quantities up to 2,000 m3/h Compact gas scrubbers consist of a jet scrubber and an absorption column which is arranged downstream. They operate according to the ejector principle and do not generate any pressure loss in the gas flow; instead they produce a pressure gain. Therefore, generally speaking, there is no requirement for a mechanical ventilator to draw off and convey the gas. The scrubbing liquid serves as motive medium. The mixture of gas and liquid is separated in a centrifugal separator arranged downstream. This is designed in such a way that foam...

Types and components Jet scrubber type I narrowest cross section of the equipment. This cross section must be adapted to the gas flow in order to achieve the same separation rate during partial load. For this purpose we have developed Venturi scrubber type U and equipped it with a variable regulating cone. The control range lies between 10 % and 100 % load, with the same high separation rate. Jet scrubbers operate according to the ejector principle and are the only gas scrubbers which suffer no pressure loss in the gas flow, but actually generate a pressure gain. This means that, generally...