Conning tower

Guard on armored ear has clear view in all directions from conning tower at rear which has dual ignition switch and brakes for emergency control... 

Conning Tower Structure atop the submarine hull that gives the crew increased visibility. 

Diving Plane Small wing that projects from either the side of the submarine hull or the conning tower and provides directional control when the submarine is submerged. 

Sensors. Early submarines relied on human sight to sense obstacles and targets around them. This led to the creation of the conning tower, a structure built atop the submarine hull that allowed a lookout to view the area around the submarine while the bulk of the vessel remained just below the surface of the water. Once submeiged, early submarines were blind and needed other means to find their way. After World War I, submarines used hydrophones, sensitive microphones mounted on the submarine hull, to listen for other ships and submarines around them. By the 1950 s, sonar allowed submarines to actively detect other vessels. 

Kitterman, Layton, Tower Internals and Accessories, Glitsch, Inc. Paper presented at Con-gresso Brasileiro de Petro Quimica, Rio de Janeiro, November 8-12, 1976. 

To select correct size tails tower and cooler absorber, to meet your specific requirements, follow the dotted line in the two charts. For example, using a 75% concentration of feed gas, 90 cooling water, and absorbing 2,000 Ibs./hr. HCI,- a 92 tube cooler absorber would be required in con unction with a 24" diameter tower. To produce acid over 20 Be to 22 Be, use 12-foot long tubes in ail instances where cooling water temperature falls to left of black dotted line in cooler absorber selection chart. Use 9-foot long tubes where temperature point is to the right of the dotted line. 

The main types of cooling towers are represented on Figure 9.18. Their chief characteristics and some pros and cons will be discussed in order. 

Let us now develop material and energy balances directly applicable to cooling towers. The idealized cooling tower operation is illustrated in Figure 5.6. The cooling tower operates with some type of heat source (a con-... 

Description Raw pyrolysis gasoline is prefractionated into a heart-cut C8 stream. The resulting styrene concentrate is fed to an extractive-distillation column and mixed with a selective solvent, which extracts styrene to the tower bottoms. The rich solvent mixture is routed to a solvent-recovery column, which recycles lean solvent to the extractive-distillation column and recovers the styrene overhead. A final purification step produces a 99.9% styrene product con-... 

Dichloride, C H C N], fP 148, Gnunojroiw. Colorless crystals, mp 300 (dec). Very sol in water, slightly sol in tower alcohols. Insol in hydrocarbons. Hydrolyzed by alkali. Inactivated by inert clays and anionic surfactants. Corrosive to metal. Non -volatile. Normal potential at 30° -0.446 voits. LDm orally in rats 125 mg/kg, D. M. Conning et al, Brit. Med. Bull 25, 245 (1969). 

All raw materials are procured either in liquid or powder form. While ensuring a certain quality, the selection is mostly based on price. The physical characteristics of the components is not important since they will be dispersed or dissolved and mixed with other liquids to form a solution or slurry. This slurry is pumped by low- or medium-pressure pumps to the spray dryer (Fig. 6.3-2). An air vessel (pressure accumulator) is used to even-out pressure peaks. The spray towers can work in con- or counter-current fashion [B.97]. Concurrent contact yields light powders (mostly made-up of hollow particles) with a bulk density of about 100-150 g/L and a moisture content of 3-10%. Also, the hollow beads tend to break-up and form dust. Counter-current drying (Fig. 6.3-2) produces powder with a bulk density of 300-500 g/L and a moisture content of 7-15% (commonly 10%). Most plants use this method because the higher bulk density is almost always desired. 

The Lanigan mine underwent significant expansion and modernization however major con-struction/overhaul of the headframe was not required. They utilize dual tower mounted hoists located on the same elevation within the headframe. The challenge with replacing these hoists was to achieve a larger capacity yet an identical hoist footprint. 

Usually some more positive means of conducting the continuous liquid from tray to tray is provided. In Fig. 10.6, a tower of the type described by Harrington (34), for example, the continuous phase flows across the plates and from plate to plate by means of the pipes provided for that purpose. These pipes extend sufficiently far to be sealed in the layer of continuous liquid on the plate. The dispersed phase collects on the trays in a coalesced layer and bubbles through the perforations of the plate. As shown, the light liquid is dispersed in the lower part of the tower and the heavy in the upper part, although only one of the liquids, preferably that which does not wet the plate, needs be dispersed. When the flow of con-... 

The stresses produced in a self-supporting vertical vessel by the action of the wind are calculated by con dering the vessel to 1 a verticle, uniformly loaded cantilever beam. The wind loading is a function of the wind veloirfty, air density, and the shape of the tower. The Unip States Weather Bureau (137) has correlated Uie above factors in the following relation ... 

Mono Lake sits at the bottom of a basin just east of Yosemite, at the foot of Mount Conness. It is one of the oldest lakes in North America, peaceful and uniquely beautiful, with towers of rugged tufa that look like they belong on an alien moon. It is also poisonous. Its arsenic-laced waters put the surrounding ecosystem under constant chemical threat. 

Reflux may not return to the tower exactly at the boiling point. In fact, it will usually be subcooled to some extent. This subcooling causes con densation of some of the vapors ap proaching the top tray of the tower. 

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