Removal of water or another solvent by evaporation from a solid, semi-solid or liquid
Laundry hung on a clothes line in a drying room (dehumidifier in the background and duct for ventilation in the ceiling)
Drying is a mass transfer process consisting of the removal of water or another solvent[1] by evaporation from a solid, semi-solid or liquid. This process is often used as a final production step before selling or packaging products. To be considered "dried", the final product must be solid, in the form of a continuous sheet (e.g., paper), long pieces (e.g., wood), particles (e.g., cereal grains or corn flakes) or powder (e.g., sand, salt, washing powder, milk powder). A source of heat and an agent to remove the vapor produced by the process are often involved. In bioproducts like food, grains, and pharmaceuticals like vaccines, the solvent to be removed is almost invariably water. Desiccation may be synonymous with drying or considered an extreme form of drying.
In the most common case, a gas stream, e.g., air, applies the heat by convection and carries away the vapor as humidity. Other possibilities are vacuum drying, where heat is supplied by conduction or radiation (or microwaves), while the vapor thus produced is removed by the vacuum system. Another indirect technique is drum drying (used, for instance, for manufacturing potato flakes), where a heated surface is used to provide the energy, and aspirators draw the vapor outside the room. In contrast, the mechanical extraction of the solvent, e.g., water, by filtration or centrifugation, is not considered "drying" but rather "draining".
^"drying - definition of drying by the Free Online Dictionary, Thesaurus and Encyclopedia". Farlex. Retrieved 23 April 2011.
invariably water. Desiccation may be synonymous with drying or considered an extreme form of drying. In the most common case, a gas stream, e.g., air, applies...
freeze-drying. Compared to other drying methods like room temperature drying, hot-air drying, and solar drying, Robusta coffee beans that were freeze-dried contained...
Supercritical drying, also known as critical point drying, is a process to remove liquid in a precise and controlled way. It is useful in the production...
Grain drying is process of drying grain to prevent spoilage during storage. The grain drying described in this article is that which uses fuel- or electric-powered...
Spray drying is a method of forming a dry powder from a liquid or slurry by rapidly drying with a hot gas. This is the preferred method of drying of many...
A non-narrative film, Paint Drying consists of 607 minutes (10 hours and 7 minutes) of a static view of white paint drying on a brick wall. The entire...
as air drying, sun drying, smoking or wind drying, although today electric food dehydrators or freeze-drying can be used to speed the drying process...
agriculture, and textiles, drying is an essential unit operation to remove moisture. Vacuum drying is generally used for the drying of substances that are...
Dried fruit is fruit from which the majority of the original water content has been removed either naturally, through sun drying, or through the use of...
Look up DRY, driest, dry, or dryness in Wiktionary, the free dictionary. Dry or dryness most often refers to: Lack of rainfall, which may refer to Arid...
of water or other solvents). Drying oils are a key component of oil paint and some varnishes. Some commonly used drying oils include linseed oil, tung...
efficiency of the drying process. The three types of drying methods are: sun drying, shade drying, and mechanical drying. Sun drying is an inexpensive...
drying room is a room intended for drying objects. It can act as a replacement or complement for drying cabinets, tumble-dryers, and outdoor drying....
drying agent in Wiktionary, the free dictionary. Drying agent may refer to: Desiccant, which absorbs water or moisture from its vicinity Oil drying agent...
reservoir. Typically a drying tube is 1–2 cm wide and 5–10 cm long and bent at an angle of about 90 degrees. In use, the drying tube is filled with a rechargeable...
product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method. There are two main reasons for drying wood: Woodworking When...
Drum drying is a method used for drying out liquids from raw materials with a drying drum. In the drum-drying process, pureed raw ingredients are dried at...
A drying cabinet is today usually an electrical machine designed to expedite the drying of items - usually clothing - that are unsuitable for a mechanical...
it. Drying is a method of food preservation that works by removing water from the food, which inhibits the growth of microorganisms. Open air drying using...
Instant coffee solids are commercially prepared by either freeze-drying or spray drying, after which it can be rehydrated. Instant coffee in a concentrated...
lime in salt water and sun drying until the insides turn black. Apricots drying on the ground in Turkey Dried banana chips Dried, ground Persian black lime...
natural/line drying. Tumble drying symbol Tumble drying (low temperature) Tumble drying (normal) Do not tumble dryDrying symbol Line dryDry flat Drip dryDry in...
of drying clothes using only the power of the sun. Customers received a length of clothesline. In Scotland, many tenement buildings have a "drying green"...
never heated during dry cleaning process. When no more solvent can be spun out, the machine starts the drying cycle. During the drying cycle, the garments...
An oil drying agent, also known as siccative, is a coordination compound that accelerates (catalyzes) the hardening of drying oils, often as they are used...
component of a gel through supercritical drying or freeze-drying. This allows the liquid to be slowly dried off without causing the solid matrix in the...
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