Entrained liquid

Eng. J., 1, 549 (1955)]. Chevron (hook-and-vane) type separators are also used because of their higher-allowable velocities or because of their reduced tendency to foiil with solids suspended in the entrained liquid. 

Entrained liquids. Production of small droplets is inherent in the bubbling process, as shown by Fig. 14-90. Values range from near zero to 10,000/cm of vapor, depending on how the vapor breaks through the liquid and on the opportunity for evaporation of the small drops after entrainment. 

Sieve trays installed with holes behind false downcomer. Entrained liquid overhead. Limited lean oil flow. Vessel manufacturer error. 

Contaminants Provide measures to remove unacceptable contaminants from feed materials, process streams and services, e.g. entrained liquid, tramp metal, unwanted particulate solids... 

The concept of removal of entrained liquid particle is essendally the same as for ware mesh designs, except the... 

Some of the same physical properties of the liquid and gas phases as well as temperature and pressure and the amount of entrained liquids (or solids if present) and the expected particle size and iLs distribution control the design and performance of these units also. 

A superheat exchanger is not needed for a centrifugal compressor system as far as gas condition is concerned. It may be a good unit as fer as other aspects of the process are involved. The centrifugal compressor requires only a suction knock-out drum to remove entrained liquid and foreign particles. 

Wall temperatures drop after reaching the maximum in the case of the two highest heat flux levels in Fig. 8, and this is due to increasing convective heat transfer through the steam film, which now completely blankets the surface. The improved heat transfer is caused by the higher flow velocities in the tube as more entrained liquid is evaporated. Finally, at about 100% quality, based on the assumption of thermal equilibrium, only steam is present, and wall temperatures rise once more due to decreasing heat-transfer coefficients as the steam becomes superheated. 

Fog formation. In the condensation of a vapour from a non-condensable gas, if the bulk temperature of the gas falls below the dew point of the vapour, liquid can condense out directly as a mist or fog. This condition is undesirable, as liquid droplets may be carried out of the condenser. Fog formation in cooler-condensers is discussed by Colburn and Edison (1941) and Lo Pinto (1982). Steinmeyer (1972) gives criteria for the prediction of fog formation. Demisting pads can be used to separate entrained liquid droplets. 

Heat transfer from the vapor to the entrained liquid droplets... 

At very high qualities the liquid film is thin and the rate of entrainment is low. The entrained liquid mass flux curve is almost parallel with the total liquid mass flux in Figure 5.26 i.e., the liquid evaporation rate is supported solely by the liquid deposition rate. If the boiling heat flux q" < q D, where q"D = GDH]g, the boiling crisis can be averted by a deposition liquid mass flux, GD, as shown in Figure 5.26, and therefore is called deposition-controlled CHF. 

The mass balances on the liquid film and on the entrained liquid in the core of an annular flow can be written as... 

There are also two terms to account for the flow of entrained liquid carried around the bundle by crossflow of gas. Two terms are necessary because if a particular gas crossflow is reversed, then the subchannel from which the flow originates (the donor subchannel) has a different concentration of entrained liquid drops in the gas phase. It is assumed here that the crossflow of gas carries liquid droplets with it, and that the droplets adopt the same crossflow velocities as the gas. It is certain that the droplets do not behave in this way, but the effect of their actual behavior is not known. The equations then are... 

Condensate - Liquid hydrocarbons that have been separated from natural gas, usually by cooling the process stream which "condense" the "entrained" liquid. Typically the fractions of C3, C4 and C5 or heavier. 

---