artificial drying meaning

How to use artificial in a sentence.

It was found that pretreatm ent . @NZ�1�f���6>�V�.1�����Y`�Enu��A�l� �tq������# �;D �cR It is used for chemicals of all types, pharmaceuticals, biological materials, foods, detergents, wood, minerals, and industrial wastes. The period or stage of drying during this initial phase, therefore, is commonly referred to as the constant-rate period because evaporation occurs at a constant rate and is independent of the solid present. Gases may be dried by the following processes: (1) absorption by use of spray chambers with such organic liquids as glycerin, or aqueous solutions of salts such as lithium chloride, and by use of packed columns with countercurrent flow of sulfuric acid, phosphoric acid, or organic liquids; (2) adsorption by use of solid adsorbents such as activated alumina, silica gel, or molecular sieves; (3) compression to a partial pressure of water vapor greater than the saturation pressure to effect condensation of liquid water; (4) cooling below dew point of the gas with surface condensers or coldwater sprays; and (5) compression and cooling, in which liquid desiccants are used in continuous processes in spray chambers and packed towers—solid desiccants are generally used in an intermittent operation that requires periodic interruption for regeneration of the spent desiccant. In industry, the drying of moist solid materials is usually carried out during the preparation of the materials for processing, use, or storage. You can get a certain insight into human nature from analysing the words that people look up in dictionaries. The physical change of a liquid paint or varnish film which results in a hard surface, as a result of the loss of solvent, or a chemical reaction, or a combination of both. A glassy surface is smooth and shiny, like glass: 2.

Final moisture contents of dry solids are usually less than 10%, and in many instances, less than 1%.

An operation in which a liquid, usually water, is removed from a wet solid in equipment termed dryers. Artificial definition is - humanly contrived often on a natural model : man-made. When drying is done with heated gases, in the most general case, a wet solid begins to dry as though the water were present alone without any solid, and hence evaporation proceeds as it would from a so-called free water surface, that is, as water standing in an open pan. Also see, A laboratory digital microwave oven (M945, Samsung Electronics Ins, China) with amaximum output of 1000 W at 2450MHz was used for the, Problems with often existing dryers tend to repeat themselves: process interruption, manual handling, unsatisfactory, The dryer has always attached a so-called Airgenex dehumidification module providing the appropriate environmental conditions inside the, The objectives of the current study are the analysis of the moisture content distribution and deformation development in wood, The end grains of the samples were coated using an aluminium foil bonded to the wood surface with PUR resin to prevent too fast, Determination of optimum conditions for half fruit, Pick-up efficiency determines the efficiency of moisture removal by the, (i) Submerged in boiling water for 3 minutes, drained and cooled immediately in tap water before being taken to the oven for, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, COMPARISON OF DRYING PROCESS AND PRESERVATIVES ON DRYING KINETICS, TEXTURE AND ANTIOXIDANTS RETENTION IN MULBERRY FRUITS, INFLUENCE OF DRYING METHODS ON SPECIFIC ENERGY CONSUMPTION AND PHYSICAL QUALITY OF TOMATO SLICES (Lycopersicon esculentum), Dry January: a new drying system from Harter is bringing impressive results, Analysis of the deformation of wood during the drying process: an experimental approach, Drying kinetics of banana (Musa spp. Attempts have been made to develop a general theory of drying on the basis that liquids move inside solids by a diffusional process. (0.5°–3°).

Drying definition: the action or process of making or becoming dry | Meaning, pronunciation, translations and examples Seasoning of Timber or Drying of Wood Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use.

The drying of gases (air, flue gases) is carried out chiefly by the methods of absorption and adsorption.

'Nip it in the butt' or 'Nip it in the bud'? Such mechanical methods are used when compression or cooling of the gas is required. Learn more. These adsorbents are readily regenerated, and they adsorb 3–12 percent of the moisture (by weight). The drying agent is heated and passed through the dryer only once, which is the distinctive feature of this type of dryer.

The brevity of the contact (1–5 sec) makes this dryer suitable for materials that are not thermostable, even when the drying agent is at a high temperature. This type of drying can be used for plastics, rubber products, and other materials possessing dielectric properties. Dielectric-heat dryers are used principally to dry materials that have high resistance to the internal movement of moisture (pencils, thin casting molds). It is possible to regulate temperature and moisture content throughout the entire volume of the material. Depending on the method of heat supply, dryers are classified as convection (direct contact between the material being dried and the stream of preheated drying agent), contact (contact between the material being dried and a heated surface), freeze (removal of moisture in the frozen state under a vacuum), dielectric-heat (removal of moisture through the action of high-frequency electric fields), and radiant-energy (drying from infrared radiation). Delivered to your inbox!, The question naturally asked is why full sun drying seems better than, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content, Embryo drying rates during the acquisition of desiccation tolerance in maize seed. The mechanical methods of drying gases, compression and cooling and refrigeration, are used in large-scale operations, and generally are more expensive methods than those using desiccants.

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This may involve agitation of the wet material in some cases. Drying is preferred to the term dehydration, which usually implies removal of water accompanied by a chemical change. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! Therefore, in recent years, the persimmon fruit drying method gradually adopted the artificial drying technique to avoid this risk and reduce microbial contamination.

All Years Desiccants are classified as solid adsorbents, which remove water vapor by the phenomena of surface adsorption and capillary condensation (silica gel and activated alumina); solid absorbents, which remove water vapor by chemical reaction (fused anhydrous calcium sulfate, lime, and magnesium perchlorate); deliquescent absorbents, which remove water vapor by chemical reaction and dissolution (calcium chloride and potassium hydroxide); or liquid absorbents, which remove water vapor by absorption (sulfuric acid, lithium chloride solutions, and ethylene glycol). has voted almost unanimously in favour of the proposal. Accessed 25 Oct. 2020. View usage for: The presence of any dissolved salts will cause the evaporation rate to be less than that of pure water. the sprayed material, the process of moisture evaporation is intense, and drying time is short (15–30 sec).

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Gases having a dew point of -40°F (-40°C) are considered commercially dry. This is done through: Read: Heated air drying versus low-temperature drying, Read: Safety considerations in mechanical drying, See more videos on the IRRI RKB YouTube Channel, Low-temperature drying or in-store drying, Heated air drying versus low-temperature drying, Safety considerations in mechanical drying, International Rice Research Institute (IRRI), International Maize and Wheat Improvement Center (CIMMYT), Cereal Systems Initiative for South Asia (CSISA), Irrigated Rice Research Consortium (IRRC), Consortium for Unfavorable Rice Environments (CURE), International Rice Information System (IRIS).

The material being dried is moved through the duct by a stream of drying agent, whose speed exceeds the free-fall velocity of the largest granules (usually 10–40 m/sec). Amaze your friends with your new-found knowledge!

Z8�t����}���n�⢟\.��U�:���3��Ilpf�P����fg\�-S���)+� Drying is a widespread operation in the chemical process industries. See the full definition for artificial in the English Language Learners Dictionary, Thesaurus: All synonyms and antonyms for artificial, Nglish: Translation of artificial for Spanish Speakers, Britannica English: Translation of artificial for Arabic Speakers. Dryers in which inert gases or air circulates in a closed path are used to dry flammable and explosive materials or to extract valuable products (alcohols, ethers) from the material being dried. And best of all it's ad free, so sign up now and start using at home or in the classroom. The mechanism of the drying of solids is reasonably simple in concept. In the basic type of convection dryer (Figure 1, a), the drying agent, which is first heated in a heater to the maximum allowable temperature, passes through the dryer and comes into direct contact with the material being dried (food products, medicines, chemical compounds). Test Your Knowledge - and learn some interesting things along the way. Dryers range in size from small cabinets to spray dryers with steel towers 100 ft (30 m) high and 30 ft (9 m) in diameter. Most of the moisture (60–85 percent) is evaporated in the chamber, with the remaining amount removed by. The materials dried may be in the form of thin solutions, suspensions, slurries, pastes, granular materials, bulk objects, fibers, or sheets. Heat is applied through conduction, convection and radiation to force water to vaporises, whilst removal of vapours is achieved by employing forced air. However, this is not true in all cases. This article will deal only with artificial drying and the various types of industrial dryers. In most cases, the internal flow mechanism results from a combination of forces which may include capillarity, internal pressure gradients caused by shrinkage, a vapor-liquid flow sequence caused by temperature gradients, diffusion, and osmosis. In the drying of solids, the desirable end product is in solid form.
When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method. ��CY��wu�+?0����!3�X� The selection of drying conditions, such as temperature, pressure, and speed of the drying agent, depends on the physico-chemical properties of the material being dried. Contact dryers, such as drum dryers, are used to dry liquid materials and pastes (xanthates of alkali metals) at atmospheric pressure or under a vacuum. From moonshoot to balconing: discover the latest words added to the Collins Dictionary. The use of heat to remove liquids distinguishes drying from mechanical dewatering methods such as centrifugation, decantation or sedimentation, and filtration, in which no change in phase from liquid to vapor is experienced. See Filtration, Heat transfer, Humidification, Unit operations. Because of the large surface area of.

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