Drying mechanism

Drying capability Drying index Drying mechanisms Drying methods Drying oil Drying oils... 

The seaweed is harvested by raking and hand-gathering. Mechanized harvesting or use of divers has met with limited success. The collected seaweed is dried mechanically in many areas and shipped to the processing plants. 

There are four principal classes of printing ink, which vary considerably in physical appearance, composition, method of appHcation, and drying mechanism. These also fall into two general types of consistency or viscosity, paste and Hquid. The classes are letter press and Hthographic (Utho) inks, which are called paste inks, and flexographic (flexo) and rotogravure (gravure) inks, which are called Hquid inks (1). 

Infrared and Microwave Inks. These ate inks which have been formulated to absorb these radiant energies. The energy causes the inks to heat and dry through the partial evaporation of solvent. Absorption of the ink into a porous substrate can also be part of the overall drying mechanism with these inks. They have not found wide commercial success due to the variabiHty of the it absorption with ink color and the energy inefficiency of microwave systems in drying nonwater-based inks. 

The drying mechanisms of desiccants may be classified as foUows Class 1 chemical reaction, which forms either a new compound or a hydrate Class 2 physical absorption with constant relative humidity or vapor pressure (solid + water + saturated solution) Class 3 physical absorption with variable relative humidity or vapor pressure (soHd or liquid + water + diluted solution) and Class 4 physical adsorption. 

These mechanisms are characterized by the relative magnitudes of the heats of reaction, solution, or adsorption (see Adsorption, separation). AH useflil drying mechanisms are exothermic. Phosphoms pentoxide is a Class 1 drying agent that reacts with water to form a polyphosphoric acid (2) ... 

The isolation of the chemicals within the protocell causes a specific problem. Once the reactions have reached the extent of equilibrium allowed, limited by composition, all chemistry stops until the protocell dries out or brings in new molecules. The drying mechanism could certainly replenish the metabolism, requiring the protocell to dry out in a localised region on a substrate and re-form. The protocell would gain some new molecules and lose some old molecules in the process. The cell metabolism chemistry will only continue away from the surface and in a fully independent way when the membrane transport problem is solved. 

Drying mechanisms Drying process in bar soap manufacture, 22 748, 750-751... 

Drying equipment, 10 154 Drying gases, commercial gas absorption process for cellulose acetate fiber production, l 26t Drying index, 9 144 Drying mechanisms, 9 102-116. 

Loras, V. (1968). Bleaching and stabilizing of flash-dried mechanical pulp. Pulp and Paper Magazine of Canada, 69(2), 57-63. 

Coatings can be divided according to formulation, drying mechanism or other system of categorizing. Table 18.8 contains a summary of coatings according to drying mechanism. 

Major Coatings Systems as a Function of Drying Mechanism... 

In addition to solvent extraction of lignans, a dry mechanical method for concentrating the lignan SDG was developed by Madhusudhan et al (2000). As a result, the content of SDG increased from 1290 and 1430 mg/100 g in whole Neche and Omega seed, respectively, to 2760 and 2380 mg/100 g in the hull-rich fractions (Madhusudhan et al, 2000). 

Madhusudhan, B., Wiesenbom, D., Schwarz, J., Tostenson, K., and Gillespie, J. 2000. A dry mechanical method for concentrating the lignan secoisolariciresinol diglucoside in flaxseed. Leb. Wiss. Tech. 33, 268-275. 

The process conditions, such as fluid composition and temperature, often have a far greater effect on the maximum useable life than the normal dry mechanical properties of the material. A typical change is from 120°C maximum temperature for dry applications to 75°C for wet applications. 

A trial program has been initiated to test inferential methods for measuring dry deposition. Although present capabilities are very limited, preliminary results for sulfur deposition at a few selected locations confirm expectations that submicron particle deposition contributes far less sulfur than does sulfur dioxide gas exchange at the surface. Overall, average total deposition of sulfur by dry mechanisms appears to be much the same as by wet deposition in the northeast, although the short-term difference can be large (in either direction) at any particular location. 

Cost of dry, mechanical dust collectors, high-voltage electrostatic precipit ators. and fabric-filter dust collectors. 

The role of the solvent in inkjet ink is a vehicle with which to deliver a functional material to the surface of a substrate. The solvent is normally driven off by either passive drying or an active drying mechanism. 

Whenever it is necessary to remove moisture from virgin or waste biomass feedstocks, air drying, mechanical dewatering, and drying with waste heat or stack gases should be evaluated first. The lower costs of these methods compared to the costs of thermal drying in which external fuel or a portion of the feedstock supplies heat may justify their use. 

The evaporation of moisture into a warm air stream, with the latter providing the latent heat of evaporation, is a common drying mechanism although it is not easily adapted to the recovery of the liquid. In the evaporation from a liquid surface which, with the passage of air, falls to the wet bulb temperature corresponding to the temperature and humidity of the air, the rate at which water vapor is transferred from the saturated layer at the surface to the drying stream is described by Eq. (15),... 

Pretreatment for all samples consists of air drying, mechanical grinding, and passage through a 2,0-irun sieve. 

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