While the general meaning of the word spray is widely known, most would struggle to give a more definitive explanation of the term. To illustrate what it really means, we can look at the spray that is produced when a deodorant can is used. The deodorant itself is stored as a liquid in the container, and emerges into the air as a mist. This familiar example ties in perfectly with how a spray is defined as drops of liquid distributed in a gas.
In the above example, the air was the gas that that the drops of deodorant were dispersed in. However, the definition of a spray allows for liquid to be sprayed into any gas, for example when various liquids are sprayed into the emissions of power plants, to help strip out harmful chemicals.
The process of creating a spray is sometimes called atomization. In practice, the liquids are not literally split down into individual atoms, but rather, small liquid droplets. The significance of changing liquids into this state can be seen by looking at some examples of how sprays are used. Since liquid sprays are used in so many applications, only a selection will be considered.
Use of sprays is widespread in the manufacturing of food and beverages. Fresh grown foods are washed with sprays, and many ingredients are added in the form of a spray. The accuracy of a spray is ideal in cases like where spice must be added. Add too much and the result will put many people off, but get it just right and it adds a pleasant kick. This same accuracy allows great control over how additives are applied, ensuring that nowhere is missed out.
Staying with food and drink, many commonplace foods are created using a technique called spray drying. Here, liquid products are turned into a fine spray, which is dried out in hot air. Instant coffee, milk powder, colorings and spice powders are made with this process.
Although spray drying is not well known outside the manufacturing industry, a more familiar spray process is that of spray painting. Most people know of the simple and common cans of spray paint, but there are also more clever applications of spray painting. One such use involves giving the paint an electric charge, while the object being painted is made to attract the paint by giving it the opposite charge. Often this electrostatic spray painting provides superior results to painting with a brush, as it can be impossible to access certain areas with a brush.
Arguably one of the most significant of all uses of sprays is the way they are utilized in engines. In many engines, the fuel is turned into a spray directly before it is ignited, creating tiny, easily ignited drops of fuel mixed evenly with air, a very desirable combination. This principle is widely applied in jet, diesel, rocket and petrol engines, as well as in steam boilers.
Although many people do not have a full understanding of what a spray is, the fact that sprays are used in power generation, familiar items such as deodorants and spray paint, food production, and in running some of our most important forms of transportation, shows how important they can be.
In the above example, the air was the gas that that the drops of deodorant were dispersed in. However, the definition of a spray allows for liquid to be sprayed into any gas, for example when various liquids are sprayed into the emissions of power plants, to help strip out harmful chemicals.
The process of creating a spray is sometimes called atomization. In practice, the liquids are not literally split down into individual atoms, but rather, small liquid droplets. The significance of changing liquids into this state can be seen by looking at some examples of how sprays are used. Since liquid sprays are used in so many applications, only a selection will be considered.
Use of sprays is widespread in the manufacturing of food and beverages. Fresh grown foods are washed with sprays, and many ingredients are added in the form of a spray. The accuracy of a spray is ideal in cases like where spice must be added. Add too much and the result will put many people off, but get it just right and it adds a pleasant kick. This same accuracy allows great control over how additives are applied, ensuring that nowhere is missed out.
Staying with food and drink, many commonplace foods are created using a technique called spray drying. Here, liquid products are turned into a fine spray, which is dried out in hot air. Instant coffee, milk powder, colorings and spice powders are made with this process.
Although spray drying is not well known outside the manufacturing industry, a more familiar spray process is that of spray painting. Most people know of the simple and common cans of spray paint, but there are also more clever applications of spray painting. One such use involves giving the paint an electric charge, while the object being painted is made to attract the paint by giving it the opposite charge. Often this electrostatic spray painting provides superior results to painting with a brush, as it can be impossible to access certain areas with a brush.
Arguably one of the most significant of all uses of sprays is the way they are utilized in engines. In many engines, the fuel is turned into a spray directly before it is ignited, creating tiny, easily ignited drops of fuel mixed evenly with air, a very desirable combination. This principle is widely applied in jet, diesel, rocket and petrol engines, as well as in steam boilers.
Although many people do not have a full understanding of what a spray is, the fact that sprays are used in power generation, familiar items such as deodorants and spray paint, food production, and in running some of our most important forms of transportation, shows how important they can be.
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