Breeze

Low Temperature Carbonization. The Lurgi Sptlgas process was developed to carbonize brown coal at relatively low temperatures to produce tars and oils (Fig. 5). A shaft furnace internally heated by process-derived fuel gas (Spblgas) is used. The product can range from a friable coke breeze to hard lump coal depending on the quality of the briquettes used in the feed. The briquettes, made in normal extmsion presses, break down into smaller sizes during carbonization. 

Coke The grinding characteristics of coke vary widely. Byproduct coke is hard and abrasive, while certain foundry and retort coke is extremely hard to grind. For certain purposes it may be necessary to produce a uniform granule with minimum fines. This is best accomplished in rod or bah mihs in closed circuit with screens. Hourly capacity of a 1.2- by 3-m (4- by 10-ft) rod mill with screens, operating on by-product-coke breeze, was 8.1 Mg (9 tons), 100 percent through No. 10 sieve, and 73 percent on No. 200 sieve power requirement, 30kW(40 hp). 

This occurs when the nocturnal inversion is dissipated by heat from the morning sun. The lapse layer usually starts at the ground and works its way upward (less rapidly in winter than in summer). Fumigation may also occur in sea-breeze circulations during late morning or early afternoon. The shaded zone of strong concentration is that portion of the plume which has not yet been mixed downward. 

The fuel flows at right angles to the air flow. Only a small amount of air is fed at the front of the stoker, to keep the fuel mixture rich, but as the coal moves toward the middle of the furnace, the amount of air is increased, and most of the coal is burned by the time it gets halfway down the length of the grate. Fuel-bed depth varies from 100 to 200 mm (4 to 8 in), depending on the fuel, which can be coke breeze, anthracite, or any noncaking bituminous coal. 

In the first reconstruction [27] of road slabs contaminated with CL, silicon iron anodes were embedded in a layer of coke breeze as shown in Fig. 19-4a or the current connection was achieved with noble metal wires in a conducting mineral bedding material. Slots were ground into the concrete surface for this purpose at spacings of about 0.3 m (see Fig. 19-4b). This system is not suitable for vertical structures. 

Fig. 19-4 Older anode system for roadway plates (a) Silicon iron anodes in coke breeze bed, (b) noble metal lead in conducting bedding in a trench.

Fig. 17-17. Sea breeze due to surface heating over land, resulting in thermals, and subsidence over water.

Just as heating in the daytime occurs more quickly over land than over water, at night radiational cooling occurs more quickly over land. The pressure pattern tends to be the reverse of that in the daytime. The warmer air tends to rise over the water, which is replaced by the land breeze from land to water, with the reverse flow (water to land) completing the circular flow at altitudes somewhat aloft. Frequently at night, the temperature differences between between land and water are smaller than those during the daytime, and therefore the land breeze has a lower speed. 

An electrostatic precipitator is used to remove more tar from coke oven gas. The tar is then sent to storage. Ammonia liquor is also separated from the tar decanter and sent to wastewater treatment after ammonia recovery. Coke oven gas is further cooled in a final cooler. Naphthalene is removed in a separator on the final cooler. Light oil is then removed from the coke oven gas and is fractionated to recover benzene, toluene, and xylene. Some facilities may include an onsite tar distillation unit. The Claus process is normally used to recover sulfur from coke oven gas. During the coke quenching, handling, and screening operation, coke breeze is produced. The breeze is either reused on site (e.g., in the sinter plant) or sold offsite as a by-product. 

Surface topography can affect the local wind patterns one example is the onshore and offshore breeze, and another example is the heat island over large urban areas. Another manmade effect is the generation of mechanical turbulence caused by the nonuniform height of buildings in a city. We will discuss this effect in more depth later on. 

Software for dispersion modeling uses Gaussian plume model. Phe system calculates concentration or deposition values for inputed time periods. May be used in conjunction with "Breeze Air."... 

Physical and Chemical Properties - Physical State at 15 XI and I atm. Liquid Molecular Weight 362 Boiling PoirU at I atm. Not pertinent (decomposes) Breezing Point Not pertinent Critical Temperature Not pertinent Critical Pressure Not pertinent Specific Gravity 1.0 at 20°C (liquid) Vapor (Gas) Density Not pertinent Ratio of ecific Heats of Vapor (Gas) Not pertinent Latent Heat of Vaporization Data not available Heat of Combustion -16,850, -9,370, -392 Heat of Decorrposition Not pertinent. 

BUOYANT PLUME RISES INTO ZONE WHERE RETURN LAND BREEZE DOMINATES wno PATTERN THIS BEHAVIOR WILL BE DtURNALLY VARYIND AND VERY DIFFICULT TO PREDICT. 

Its equations account for advection, Coriolis effects, turbulent heat, momentum, moisture iran.sport, and viscosity. The system treats diurnaliy varying winds such as the land-sea breeze and... 

BREEZE is a software package for ventilation airflows in single and muT ticefled buildings, developed by the Building Research Establishment. BREEZE also includes a contaminant analysis routine. 

BRE Manual of BREEZE. Garston, Watford Building Research Establishment, 1997. 

Land breeze The air movement that takes place after sunset, when the land cools and air currents flow from the land to the cooler sea. 

Brisanz, /. brisance. shattering power, -ge-schoss, n. high-exploeive shell, H.E. shell, -sprengstoff, m. high explosive, disruptive. Brise, /. breeze. 

Grus, m, tk n. small fragments, smalls, fines specif., small coal, slack breeze fine gravel debris, -boden, m. soil from rock debris, -kakao, m. cacao hiisks. -kohle, /. small coal, slack, -koks, m. coke fines, coke breeze. 

Perl-kohle,/. pea eoal. -koks, m. eoke breeze, -leim, m, pearl glue, -moos, n. pearl moss, earrageen. -mutter, /. mother-of-pearl, naere. 

Wimperinfusorien, /.pi. (Zodl.) CiUata. wimperad, p.a. ciliated, ciliary winking. Wind, m. wind, breeze air blast. -blSser, m. 

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