Grease Kitchen

The Fats and Oils—Olive-oil—Tallow—Lard—Falm-oil—Cocoa-nut Oil— Oastor-oil —Bone-grease—Horse-grease—Kitchen-stuff— Oleine, or Tallow-oil—Fish-oils— Eesin, or Colophony—Be-oovered Grease or Yorkshire Fat—The Alkalies—Oaustio Soda -Potash—Silicate of Soda, or Soluble Glass-China Clay, or Kaolin—Sulphate of Soda, or Glauber s Salt. ... 

FIGURE 10.93 Design of exhaust with wall jet for a kitchen hood with partly shielded sides and circular grease filter. 

Grease A filter used in kitchen air extraction systems to prevent the contamination of the ductwork system with grease, which would be a fire hazard. 

Cooker hood A device to collect cooking fumes from above a kitchen range and discharge them to the outside. It may incorporate a grease filter, fan, and fire damper or non-return flow damper. 

Wet or dry chemical fixed suppression systems are typically provided over the kitchen cooking appliances and in exhaust plenums and ducts. Activation means is afforded by fusible links located in the exhaust ducts/plenums usually rated at 232°C (450°F). Manual activation means should not be provided near the cooking area, but in the exit routes from the facility. The facility fire alarm should sound upon activation of the fixed suppression system and power or gas to the cooking appliances should be automatically shut off. The ventilation system should also be shut down by the activation of the fire alarm system. Protective caps should be provided on the suppression nozzles to prevent plugging from grease or cooking particulates. 

We often clean away the grime and dirt in a kitchen with bleach, the active ingredient of which is the hypochlorite ion CIO-. The cleaning process we see by eye ( the bleaching reaction ) occurs between an aqueous solution of CIO- ion and coloured species stuck to the kitchen surfaces, which explains why the dirt or grease, etc., appears to vanish during the reaction. The reaction proceeds concurrently with colour loss in this example. 

Most forms of grease in the kitchen derive from organic materials in the home - some derive from meat, some from vegetable oils and some from pets in the home, or even human tissue such as oily fingerprints. (Kitchen grease is, in fact, a complicated mixture of chemicals, each of which reacts with bleach at a different rate and, therefore, with a different value of k.)... 

Good resistance to moisture, greases and healthcare products are required for kitchen and bathroom furniture. 

Excellent for cleaning automobile windshields, household windows, refrigerators, stove tops, and kitchen counter surfaces. It removes grease and dirt and is easy to wipe off because of the lubricity provided by the silicone fluid. This formulation also provides anti-fog properties. 

Small quantities of NAPL can move into porous media under both gravity and capillary effects and can become essentially immobilized, due to discontinuities that develop in the NAPL as it spreads out these discontinuities are very much like the ones formed in water films in very dry porous media. Discontinuities prevent flow of NAPL from one region to another the amount of NAPL present when flow stops is called the residual saturation. The effect can be likened to that of water breaking into discontinuous, discrete droplets on the bottom of a greasy kitchen sink, thereby preventing flow of the last drops of water down the drain. (In this domestic example the water, not the grease film, is the discontinuous phase.) Residual saturation depends on soil texture and on the surface tension (cr) between the NAPL and water this surface tension is approximately 30 to 50 dyn/cm for many immiscible solvents and fuels. Residual saturation also depends on the initial water content of the porous media when the NAPL is introduced. 

To illustrate the problem for the product developer, one only has to enumerate the soils and surfaces. The soils can vary from simple dust and hair to dirt, hard water spots, and fingerprints to hardened grease, soap scum, and excrement. Although the usual household cleaning tasks are concentrated in only two rooms of the house, kitchen and bathroom, the number of different surfaces encountered are many. In the U.S., for example, there may be Formica , ceramic tiles, grout, lacquered wood, vinyl flooring, painted surfaces, brass, stainless steel, enamel, porcelain, aluminum, chrome, glass, marble, methyl methacrylate, and other types of plastics. All of these materials may occur within only two rooms of the same home ... 

There are also examples of formulations that include a dye so that soil can be visualized so as to signal to the consumer when complete cleaning has taken place by the absence of the color [188], Admittedly, some soils, like soap scum and grease, are apparent on light-colored household surfaces mainly by their dulling of the natural shine of a surface. In this case, the dye is sensitive to the presence of protein, so if the soil was a pure grease soil (like many kitchen soils) it would fail to react, whereas it would probably be highly indicative of bathroom soils. 

The problem is that in order to fulfd the increasingly ambitious claims for their products, manufacturers rely on combinations of chemicals that can be harsh and highly toxic. Many of these products easily evaporate or give off gases that can contaminate the air indoors. If a cleaner can instantly strip a kitchen tile of years of accumulated grease, what might it do to your skin or your body s cells if you happen to breathe it in, or to the natural environment ... 

Inorganic sodium silicate adhesives had minor commercial use in 1867, but it was not until 1900 that their use as a glue became of commercial importance as a replacement for starch in the production of corrugated and solid fiber paperboard [5, p. 279]. Very fine silicate frit mixed with phosphoric acid was used as a dental cement [5, p. 376] before the twentieth century. Magnesium chloride inorganic cements were used at least as far back as 1876 in hospital kitchen floors, as they provide resistance to greases and oils [5, pp. 355-356]. 

Aluminum is the wonder material of the 20th century. In the kitchen it s found as aluminum foil, a lightweight, flexible sheet of metallic aluminum. It s usually covered by a thin layer of grease to help prevent oxidation. Aluminum is resistant to breakdown over a wide range of conditions, so you can put it in the freezer or the oven, wrap your sandwiches with it, and not be afraid that the aluminum is dissolving into your food. 

London Mottled Soap is generally made from melted kitchen stuff, bone grease, cheap tallow, and any inferior fatty matter that will prove serviceable. The leys are ade from crude soda ash, termed black ashy the impurities in which give the mottled or marbled strike," for which this variety of soap is famed. The goods, as the fatty materials are called, are first put into the pan, when the first dose of ley, at sp. gr. 1 050, is run in, after which the fire is made up beneath the pan, and the materials brought to a steady boil. To assist the combination of the tty substances with the ley, a workman constantly... 

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