Foam separation equipment

Yoichiro (1986) proposed continuous countercurrent foam separation equipment in which samples are introduced into the middle portion of a gas-liquid dual countercurrent flow system. Material having an affinity to the foam is carried with the foam stream whereas other materials are carried with the liquid stream. 

Effects of Increasing Sinian Crude GOR. Following the installation of the foam monitoring equipment and emergency trip systems, the Ninian crude GOR was increased to 47 scf/bbl (8.5 std mJ/mJ]. The flow of HP separator gas to the power station was maintained while LP separator gas continued to be flared. 

The foaming problem at Suliom Voc terminal was overcome by the development of a novel anti-foam chemical that is effective in breaking down ihe very stable foams generated by g3s release from live crude Foam detection equipment on separators has proved an invaluable as set in aiding foam control... 

A simple and largely applied method for foam formation is dispersion of gas through porous plates (filters) placed at the lower parts of foam generation apparatus [5-10], This method is employed in flotation, in gas adsorption and dust collection in set-up with turbulent gas emulsion, and in the equipment for foam separation. The dispersity of a foam thus obtained depends on filter pore size or capillary diameter, hydrophility of the material used in the dispersion device construction, physicochemical properties of the foaming solution (surface tension, viscosity, surfactant concentration, etc.) and conditions of the dispersion process. 

A block-scheme of the apparatus used in laboratory and industrial foam separation is presented in Fig. 10.1. A detailed description of the equipment used for foam separation can be found in [3,20,23]. 

Fluidized beds, non-catalyzed solids, 595 Foam separation, 635 data, 644 equipment, 644... 

All of the investigations with cell flotation presented in the cited literature were performed with small laboratory equipment. Gehle et al. [117] reported on the investigation on a pilot-scale apparatus consisting of a 300-1 stirred tank reactor provided with a foam separator (Fundafoam Chemap) and a flotation colunm, 3.6 m height, 10 cm internal diameter, which was directly connected to the reactor (Fig. 7). 

Wang W, Yue H, Yuan YQ 2009. A primary study on partial purification of lysozyme from chicken egg white using foam separation method. Biotechnol Biotechnol Equip 23(2) 1237-1241. 

Dinitroaniline from 3 5-dinItrobenzoic acid. Place a solution of 50 g. of 3 5-dinitrobenzoic acid (Section IV, 168) in 90 ml. of 10 per cent, oleum and 20 ml. of concentrated sulphuric acid in a 1-litre three necked flask equipped with a reflux condenser, mechanical stirrer, adropping funnel, and thermometer (FUME CUPBOARD ). Add 100 ml. of clJoroform and raise the temperature to 45°. Stir rapidly and add 17 -5g. of sodium azide in small portions whilst maintaining the temperature at 35-45°. The reaction is accompanied hy foaming, which usually commences after about 3 g. of sodium azide has been introduced. After all the sodium azide has been added raise the temperature so that the chloroform refluxes vigorously and maintain this temperature for 3 hours. Then cool the reaction mixture, pour it cautiously on to 500 g. of crushed ice, and dilute with 3 litres of water. After 1 hour, separate the yellow solid by filtration at the pump, wash well with water and dry at 100°. The yield of 3 5-dinitroaniline, m.p. 162-163°, is 39 g. The m.p. is unaffected by recrystallisation from dilute alcohol. 

The gas-oil separator can be equipped with a mechanical device to destroy or prevent a presumptive foam. 

Stripping of hazardous substances Mercury switches and other components containing particularly hazardous substances must be removed CFCs are recovered from the cooling circuit and PU foam with special equipment and appliances with varying degrees of automation ammonia is dissolved in water and separate disposal of waste oil (from compressors). 

Ferric hydroxide coprecipitation techniques are lengthy, two days being needed for a complete precipitation. To speed up this analysis, Tzeng and Zeitlin [595] studied the applicability of an intrinsically rapid technique, namely adsorption colloid flotation. This separation procedure uses a surfactant-collector-inert gas system, in which a charged surface-inactive species is adsorbed on a hydrophobic colloid collector of opposite charge. The colloid with the adsorbed species is floated to the surface with a suitable surfactant and inert gas, and the foam layer is removed manually for analysis by a methylene blue spectrometric procedure. The advantages of the method include a rapid separation, simple equipment, and excellent recoveries. Tzeng and Zeitlin [595] used the floation unit that was devised by Kim and Zeitlin [517]. 

The first application of a rhodium-ligand system was realized in the LPO-process (low pressure oxo Fig. 18). Huge stirred tank reactors are used, equipped with internal heat exchangers to control the heat of reaction. The solution of the catalyst recycle is simple but efficient. The catalyst remains in the reactor, products and unconverted propene are stripped by a huge excess of synthesis gas. Because of strong foaming, only a part of the reaction volume is used. After the gas has left the reactor, the products are removed by condensing, the big part of synthesis gas is separated from the liquid products and recycled via compressors. The liquid effluent of the gas-liquid separator... 

Permanent gamma ray scanning equipment was installed on each separator along with foam density and level recorders in the process control room. An emergency trip system that automatically shuts a valve in the appropriate separator gas line to isolate the separator from the compressor suction drums when a high foam level occurs was added also. A similar trip system was insulted in the gas feed line from the HP separator to the power station... 

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