Point discharges

Solids. Increasing use of bulk cars, especially of covered hopper cars, has accompanied the expansion of the tank-car fleet. The principal drawback of bulk cars is the requirement for limited use, specialized cars, which necessitates a large investment. However, if such investment can be justified, the cost of transportation for dry bulk materials ia hopper cars usually is less than those for goods ia shipping containers. In many instances, such cars are used in closed-loop service that is, they shuttle in unit trains between filling and discharge points. Similar equipment is also used in specialized highway vehicles whose tmck bodies can incorporate dump hoppers and built-in conveyors. 

Phthalates in Water. Reported levels of phthalates in natural waters are, in general, low. Concentrations found in fresh waters range from nondetectable up to 10 )-lg/L. Measured concentrations (54) in Swedish rivers vary from 0.3 to 3.1 )-lg/L. The highest values are found near industrial discharge points. 

Install ring dams at intermediate and discharge points. 

Dried product is collected in either cyclones or baghouses depending upon the product-particle size. When primary coUection is carried out in cyclones, secondary collection in a baghouse or scrubber is usually necessary in order to comply with environmental regulations. A rotary valve is used to provide an airlock at the discharge point. Screws are utihzed to combine product from multiple cyclones or large bag-houses. If required, a portion of the dried product is separated from the main stream and returned to the feed system for use as backmix. 

Since the belt is wrapped snugly around the material, it moves with the belt and is not subject to any form of internal movement except at feed and discharge. In addition, the belt can operate in many planes, with twists and turns to meet almost any layout condition within the fixed hmit of curvature placed on the loaded belt. It can convey and elevate with only a single drive multiple feed and discharge points are relatively easy to arrange. 

The mechanical flame barriers, which are used for explosion isolation of flammable gas and solvent vapor explosions, are veiy susceptible to the action of dirt and, with one exception, are thus not suitable for dust-canying pipelines. The exception involves the rotaiy valve (see Fig. 26-45), which is based on the flame-quenching effect through narrow gaps and is mainly used at product charging and discharging points. 

Full-Bore and Punctured Pipe Discharge With a pipe puncture, the mass flux at the discharge point is larger than the mass flux in the pipe G,p, by the puncdure-to-pipe area ratio A j/Ap, or (D/Dp) , denned as C. Specifically ... 

Chemical-mediated immune suppression has been identified from the experimental study of several wildlife species. Harbour seals fed either chemically contaminated fish from the Wadden Sea or imcontaminated fish were found to have differing immune responses, with the exposed group showing lowered immune response to microbial infections and certain types of cancer. "" Mink fed fish taken from below a discharge point for bleached Kraft pulp mill effluent have also shown impaired immune function, " showing that the non-accnmillative chemicals in this effluent can actively disrupt endocrine associated functions. 

Negative (vacuum) system normally used when conveying from several pickup points to one discharge point. 

Step 9.1 Identify the Effluent Discharge Points. Determine the points at which wastewater leaves the site. Wastewater may go to an effluent treatment plant, directly to a public sewer, or directly to a watercourse. One factor that is often overlooked in audits is the use of several discharge points. It is important to identify the location, type, and size of all discharge flows. Identify where flows from different unit operations or process areas contribute to the overall flow. In this way, it is possible to piece together the drainage network for the site. This can lead to startling discoveries of what goes where ... 

The termination of the cone section is the apex orifice. The critical dimension is the inside diameter at the discharge point. The size of this orifice is determined by the application involved and must be large enough to permit the solids that have been classified to underflow to exit the cyclone without plugging. The normal minimum orifice size would be 10% of the cyclone diameter and can be as large as 35%. Below the apex is normally a splash skirt to help contain the underflow slurry in the case of a hydroclone. 

Enter the applicable letter code for the receiving stream or water body from Section 3.10 of Part I of the form. Also, enter the total annual amount of the chemical released from all discharge points at the facility to each receiving stream or water body. Include process outfalls such as pipes and open trenches, releases from on-site wastewater treatment systems, and the contribution from stormwater runoff, if applicable (see instructions for column C below). Do not include discharges to a POTW or other off-site wastewater treatment facilities in this section. These off-sife transfers must be reported in Pari III, Section 6 of the form. 

A variable pitch screw that transports the cake radially towards the discharge point. 

Tables 7 and 8 give the short-term ground level concentrations for a 3-minute venting at 1/2, 1.0, 1-1/2, 2.0, and 5 miles from the discharge point respectively. The calculations assume meteorological conditions to be constant for approximately 10-minutes. Values in Tables 7 and 8 were computed for the six stability classes over a range of wind speeds.

Report public drinking water utility intakes located down river from a discharge point (an industrial facility). 

Report the distance between a discharge point and intake. 

It is important to recognize that a cenlrijugal pump will operate only along its performance curve [10, II]. External conditions will adjust themselves, or must be adjusted in order to obtain stable operation. Each pump operates within a system, and the conditions can be anticipated if each component part is properly examined. The system consists of the friction losses of the suction and the discharge piping plus the total static head from suction to final discharge point. Figure 3-51 represents a typical system head curve superimposed on the characteristic curve for a 10 by 8-inch pump with a 12-inch diameter impeller. 

Usually the relief of explosions cannot readily, safely, or conventionally be released right at the source, wiiether in a building or in a w orking plant area. Therefore, these reliefs are directed to some discharge point W here the... 

Several types of valves used in compressor cylinders are shown in Figure 12-6. To function properly, a valve must seat uniformly and tighdy, yet must not have snap-action on opening or closing. Until pressure builds up to the discharge point, the valve must remain closed, open at dis-... 

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