Washer spray

Alkaline cleaners and detergents are used in spray washers followed by hot water rinses. Water temperatures of 74 °C are required to melt fats and oils and to facilitate removal of smut or... 

Soil Light drawing oil Surface Aluminum Application Method Spray washer Manufacture Ribbon or paddle blender... 

Application Method-Spray washer Manufacture-Dry blend/Agglomerat i on... 

Truek maintenanee work usually requires a parts washer which may involve either a heated or ambient temperature solvent, hot tank, or a spray washer. In the solvent tank washer, solvent (usually mineral spirits, petroleum distillates, and naphtha) is recirculated from solvent tank. Spent solvent is usually replaced monthly. Carburetor cleaning compounds contain dichloromethane. Tanker cleaning often involves a solvent spray. 

The gas from the reactor is quenched enough to solidify the molten ash droplets before they reach the waste-heat boiler, mounted directly above the gasifier. A spray washer cools the gas from 500°F to about 95°F after the boiler. At this temperature, the gas goes through two Thiessen disintegrators, which mechanically agitate the gas with water to remove more particulates. A demister follows the disintegrators and, if the gas is to be compressed, the demister is followed by electrostatic precipitators. 

Uses Low foam alkaline metal cleaner for use in recirculating spray washers or immersion cleaning systems for esp. tough soils such as lapping compds., heavy grease, and drawing compds. safe for all metal surfs. 

Chem. Descrip. Blend of silicone, glycols, and surfactants Uses Foam control in in paper mill stock systems, plastics recycling operations, spray washers and CIP systems Features Silicone-based exc. rinsaility... 

Features Contains silicone but does not exhibit the paint of plating adhesion problems normally associated with silicone effective in controlling foam in applications where soap-based lubrioants are removed in spray washers phosphate-free Properties Translucent off-wh. Iiq. mild odor nmisc. with water pH (50% sol n.) 7-8... 

Uses Foam control agent in industrial operations (egg washers, spray washers, paper mill stock systems, plastic recycling operations and CIP systems) for both acid and alkaline systems... 

Humidification. For wiater operation, or for special process requirements, humidification maybe required (see Simultaneous HEAT and mass transfer). Humidification can be effected by an air washer which employs direct water sprays (see Evaporation). Regulation is maintained by cycling the water sprays or by temperature control of the air or water. Where a large humidification capacity is required, an ejector which direcdy mixes air and water in a no22le may be employed. Steam may be used to power the no22le. Live low pressure steam can also be released directly into the air stream. Capillary-type humidifiers employ wetted porous media to provide extended air and water contact. Pan-type humidifiers are employed where the required capacity is small. A water filled pan is located on one side of the air duct. The water is heated electrically or by steam. The use of steam, however, necessitates additional boiler feed water treatment and may add odors to the air stream. Direct use of steam for humidification also requires careful attention to indoor air quahty. 

Chemical Neutralization. Spray-type air washers are used extensively for removal or neutrali2ation of noxious components from large volumes of air, particularly exhaust air streams. Appropriate reagents are sprayed into the washer to purify the air by neutrali2ation, eg, sodium hydroxide solution is used if the air contains acidic gases. The solution must be continuously reconcentrated and any precipitated salts removed. The contact efficiency of such washers is high, and the simple constmction provides easy maintenance and constant efficiency (see AiRPOLLUTlON CONTROL METHODS). 

Figure 11-69 describes a typical central system. Either water or direct-expansion refrigerant coils or air washers may be used for cooling. Steam or hot-water coils are available for heating. Humidification may be provided by target-type water nozzles, pan humidifiers, air washers, or sprayed coils. Air cleaning is usually provided by cleanable or throwaway filters. Central-station air-conditioning units in capacities up to about 50,000 cu ft/min are available in prefabricated units. 

Type of Treatment Items Treated Splashers or Spray Nozzles Stairway and Handrail Structural Connectors Ring Joint Connectors Bolts, Nuts, Washers Anchor Connectors Nails Mechanical Equipment Support Anchor Bolts—Material Furnished by Cold Water Basin—Material Furnished by Basin Accessories, by Mfg. ... 

A device called an air washer is also used for humidification and dehumidification, It consists of a chamber incorporating a water spray system, a collection tank, and an eliminator section. The eliminator plates are necessary to reduce the incidence of water droplets that are carried out of the plant into the duct run. 

Another type of air washer is the capillary air washer see Fig. 9.16. It consists of many thousands of small glass or plastic filaments (cells) providing a large, wetted surface area. These are placed to allow a parallel path of air through them. The surface of each of these strands is covered with the water that is discharged from sprays. 

Washer, air A device for adding moisrure to an air stream by means of spray or capillary action. This term should not be used to relate to any wet cleaning process of a gas or other air stream. 

Due to bypass, a single bank of sprays might achieve 60 per cent saturation and a capillary washer (one where the air passes through a wetted mat) might achieve 95 per cent. 

The process of adiabatic saturation in Section 24.4 assumed that the spray water temperature had no effect on the final air condition. If, however, a large mass of water is used in comparison with the mass of air, the final condition will approach the water temperature. If this water is chilled below the dew point of the entering air, moisture will condense out of the air, and it will leave the washer with a lower moisture content (see Figure 24.7). 

The ultimate condition will be at the initial water temperature B. Practical saturation efficiencies (the ratio AC/AB) will be about 50-80% for air washers having a single bank of sprays and 80-95% for double spray banks (see Figure 24.8). 

Example 24.6 Air at 23°C dry bulb, 50% saturation, enters a singlebank air washer having a saturation efficiency of 70% and is sprayed with water at 5°C. What is the final condition ... 

If by water spray or washer, the necessary heat must be put into the air first to provide the latent heat of evaporation. This can be done in two stages, A to T to C, or three stages A to Hto Jto C, if reheat is required to get the exact final temperature. The latter is easier to control. 

Steam washers These spray FW or condensate into the steam to dilute, rinse, and remove entrained contaminants. Additional steam drying capacity is required to deal with the spray water. 

Apples. The Rome Beauty apples used in the wash tests were sampled from trees that had received varying amounts of DDT mixtures in as many as six cover sprays. Duplicate or triplicate samples of 30 apples each were taken at random for the residue analyses from the fruit passed through each experimental wash mixture. Additional lots of 30 washed apples each were placed in cold storage for subsequent examinations. Unless otherwise indicated, all washing tests were run in a flood-type washer of recent design (a BADD washer with a heated prewash tank unit, an unheated main tank unit, a water rinse tank unit, and a velour roller dryer unit, manufactured by the Bean-Cutler Division, Food Machinery Corporation, San Jose, Calif.). Surface deposits of DDT were determined as described (10, 12) on samples taken just before and immediately after the washing treatments. 

Magnetic sensors for controlling the movements of the water spray arms in dish washers... 

Wet washers (including spray Removal of fine dusts down to about... 

The main difficulty in operating any gas washer is the wetting of the particles because it is often necessary for the liquid to displace an adsorbed layer of gas. In some cases the gas is sprayed with a mixture of water and oil to facilitate wetting and it may then... 

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