Spray-wash systems

Add 0.1-0.2 pounds of detergent per gallon of water output to the spray nozzle. Mix powder detergent in tank and meter into car wash system. Mild abrasive cleaning and polishing effect of Turbobrite is extremely effective in high pressure spray wash systems for removing oil and water deposits, particulate soils, and haze from body parts and windshields. 

Dilute liquid Turbobrite L at high pressure pump with water (1 gallon detergent 128 gallons water) and deliver to high pressure spray wash system. 

Preparation of Cane for Milling. Because of the presence of adhering soil, rocks, and field trash, mechanically harvested cane usually must be washed before milling. In some carefully controlled situations, when the weather has been dry, washing can be eliminated. Washing systems range from a simple spraying with warm water on the carrier or cane table to an elaborate system... 

Ultrasonic systems using less harmful and corrosive materials have been successfully used as an alternative to vapor cleaning. For example, stainless steel, which used to be cleaned with distillate-spray wash and vapor rinse using 1,1,1 -trichlo-roethane, has been replaced by immersion in ultrasonic bath containing trichloro-trifluoroethane and methanol. Hence the beneficial substitution of one organic solvent by a more environmentally friendly cleaner is possible. 

Dissolve in stock tank and meter into wash system. Composition B can be utilized in high pressure spray carwash systems and supplies good soil removal. 

Waterwash spray booth. A spray booth equipped with a water washing system designed to minimize dusts or residues entering exhaust ducts and to permit the recovery of overspray finishing material. 

Uses Hydrotrope, solubilizer used in alkaline cleaners and detergents, low-foam alkaline systems, high-pressure alkaline spray wash, chlorinated detergents and sanitizers, automatic dish Ilq. detergents, low-foam spray vac and metal cleaners, textile mercerizing... 

A filter cake from the wringer is washed to remove absorbed acid, transferred to a slurry tank of water, and quickly submerged, after which the nitrocellulose is pumped to the stabilization operation as a diluted water slurry. Exhaust systems are installed to protect personnel and equipment from acid fumes, and water sprays and cyclone separators are used for acid fume recovery before venting to the air. 

Reaction times can be as short as 10 minutes in a continuous flow reactor (1). In a typical batch cycle, the slurry is heated to the reaction temperature and held for up to 24 hours, although hold times can be less than an hour for many processes. After reaction is complete, the material is cooled, either by batch cooling or by pumping the product slurry through a double-pipe heat exchanger. Once the temperature is reduced below approximately 100°C, the slurry can be released through a pressure letdown system to ambient pressure. The product is then recovered by filtration (qv). A series of wash steps may be required to remove any salts that are formed as by-products. The clean filter cake is then dried in a tray or tunnel dryer or reslurried with water and spray dried. 

For wet ESPs, consideration must be given to handling wastewaters. For simple systems with innocuous dusts, water with particles collected by the ESP may be discharged from the ESP system to a solids-removing clarifier (either dedicated to the ESP or part of the plant wastewater treatment system) and then to final disposal. More complicated systems may require skimming and sludge removal, clarification in dedicated equipment, pH adjustment, and/or treatment to remove dissolved solids. Spray water from an ESP preconditioner may be treated separately from the water used to wash the ESP collecting pipes so that the cleaner of the two treated water streams may be returned to the ESP. Recirculation of treated water to the ESP may approach 100 percent (AWMA, 1992). 

Spray-type collectors In this system water is sprayed or cascaded onto the contaminated air directly or through packed towers, and the fumes or dust are washed away by absorption. These collectors are used extensively on the treatment of fumes of all types and have low pressure drops and hence low power requirements compared to induced spray. A development of this collector is the venturi scrubber, which injects high-pressure water into a venturi through which the fume-laden air is passing. The intimate contact of the two ensures absorption and removal from the air stream. These collectors are used in fume removal and have efficiencies of more than 99 per cent on sub-micron particles. 

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