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The word scrubber can mean:- - The part of a rebreather breathing set which absorbs the carbon dioxide which the individual using the breathing set breathes out. See rebreather.
- An industrial pollution control device, usually installed on the exhaust chimneys of large furnaces, but may also be used on any number of other air exhaust systems: described here.
- In the UK, a derogatory term popular during the late 1980s and 1990s for someone either sexually promiscuous and/or exhibiting behaviour which may be perceived as stereotypical of people from the 'lower classes', grazingly described to be "As common as muck". Such usage has been somewhat superseded by the terms slapper and chav, and for a short time during the late 1990s by minger. The term 'scrubber' was at times incorrectly treated as synonymous with scuffer - a derogatory term sometimes used to describe police officers.
Inspiration closed circuit diving rebreather A rebreather is a type of breathing set that provides a breathing gas containing oxygen and recycles exhaled gas. ...
For breathing apparatus used underwater, see scuba sets and rebreather and surface supplied diving. ...
Carbon dioxide is an atmospheric gas comprised of one carbon and two oxygen atoms. ...
Inspiration closed circuit diving rebreather A rebreather is a type of breathing set that provides a breathing gas containing oxygen and recycles exhaled gas. ...
A chimney is a system for venting hot gases and smoke from a boiler, stove, furnace or fireplace to the outside atmosphere. ...
The 1980s in its most obvious sense refers to the decade between 1980 and 1989. ...
The 1990s refers to the years 1990 to 1999; the last decade of the 20th Century, but in an economical sense The Nineties is often considered to span from the fall of the Berlin Wall in November 1989 to the September 11 attacks in 2001. ...
In modern usage, a stereotype is a simplified mental picture of an individual or group of people who share a certain characteristic (or stereotypical) qualities. ...
A social class is, at its most basic, a group of people that have similar social status. ...
Wiktionary has a definition of: Slapper In the United Kingdom, a slapper or a scrubber is a sexually promiscuous lower class woman. ...
Look up chav and charva in Wiktionary, the free dictionary. ...
This article does not cite its references or sources. ...
Constables and Police Community Support Officer of the Metropolitan Police Royal Canadian Mounted Police Police forces are government organisations charged with the responsibility of maintaining law and order. ...
Removal and neutralization
The exhaust gases of combustion may at times contain substances considered harmful to the environment, and it is the job of the scrubber to either remove those substances from the exhaust gas stream, or to neutralize those substances so that they cannot do any harm once emitted into the environment as part of the exhaust gas stream. Combustion or burning is a chemical process, an exothermic reaction between a substance (the fuel) and a gas (the oxidizer), usually O2, to release heat. ...
Wet scrubbing A wet scrubber is used to clean air or other gases of various pollutants and dust particles. Wet scrubbing works via the contact of target compounds or particulate matter with the scrubbing solution. Solutions may simply be water (for dust) or complex solutions of reagents that specifically target certain compounds. Removal efficiency of pollutants is improved by increasing residence time in the scrubber or by the increase of surface area of the scrubber solution by the use of sprays, packed towers or a venturi. Wet scrubbers will often significantly increase the proportion of water in waste gases of industrial processes which can be seen in a stack plume. Air is a name for the mixture of gases present in the Earths atmosphere. ...
A gas is one of the four main phases of matter (after solid and liquid, and followed by plasma), that subsequently appear as a solid material is subjected to increasingly higher temperatures. ...
Pollutants are substances which directly or indirectly damage us or the environment. ...
Dust is a general name for minute solid particles of diameters less than 500 micrometers (otherwise see sand or granulates) and, more generally, for finely divided matter. ...
Acid neutralization One common form of scrubbing is to neutralize corrosive vaporized acids in the exhaust steam, such as sulfur dioxide that is emitted when coal containing sulfur is burned. These vaporized acids create smog, and can cause acid rain that eats away at sculptures and stonework. Sulfur dioxide (or Sulphur dioxide) has the chemical formula SO2. ...
This article needs to be cleaned up to conform to a higher standard of quality. ...
Acid rain is defined as any type of precipitation with a pH of below 5. ...
The scrubbing of acids involves powdered lime, which may be mixed with water to form a paste or can also be used dry. The lime is sprayed into the exhaust gas stream inside a reaction chamber. The lime reacts with the acid, neutralizes it, and absorbs it, turning into gypsum which is removed from the exhaust gas stream and can then be used for making other products. Another method is the use of the dry sorbent scrubber. Limestone pellets (~5mm)are introduced to the top of a tank where they are distibuted via gravity and evenly spaced baffles. Acid gas flows countercurrently to the falling limestone and reacts with the surface of the pellet. The pellets fall into a hopper which is collected by a screw and fed into a device which scrapes the outside layer of the reacted limestone off, at which point it is ready to be pushed back up to the top of the tower. This method is not as efficient as lime injection, and also produces limestone dust as a pollutant in the stack exhaust.
Mercury removal Mercury has no known beneficial uses in nature, but it is a common substance found in coal that must also be removed. However, current methods for mercury removal are not very good, and often only remove up to 75% of the mercury vapor from the exhaust gas stream. General Name, Symbol, Number mercury, Hg, 80 Chemical series transition metals Group, Period, Block 12, 6, d Appearance silvery white Atomic mass 200. ...
Scrubber waste products One side effect of scrubbing is that the process only moves the unwanted substance from the exhaust gases into a solid paste or powder form. If there is no useful purpose for this solid waste, it must be either contained or buried to prevent environmental contanimation.
Mercury removal results in a waste product that either needs further processing to extract the raw mercury, or must be buried in a special hazardous wastes landfill that prevents the mercury from seeping out into the environment. Landfill is a waste disposal site for the deposit of the waste onto or into land (i. ...
See also The Electrostatic precipitator, ESP, or electrostatic air cleaner is a particulate collection device that removes particles from a flowing gas with electric forces. ...
Flue gas desulfurization is technology that employs a sorbent, usually lime or limestone, to remove sulfur dioxide(SO2) from the gases produced by burning fossil fuels. ...
Oil desulfurization is a widely used precombustion method for reducing sulfur dioxide emissions from oil-burning power plants. ...
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