Rectangular vessels

Clarifiers. The largest user of clarifiers is probably the water-treatment industry. The conventional one-pass clarifier uses horizontal flow in circular or rectangular vessels (Eig. 2) with feed at one end and overflow at the other. The feed is preflocculated in an orthokinetic (paddle) flocculator... 

Modern-day designs are more sophisticated than the early, simple separators of a few decades ago that were introduced by the petroleum industry. Commercial systems are comprised of cylindrical vessels, rectangular vessels, above and underground installations. Figure 29 shows an underground system advertised by Tank Direct. 

The strainmaster is a rectangular vessel construction fitted with a conical shaped bottom. The vessel is equipped with straining pipes horizontally orientated in the lower part. The advantage is that the pipes represent a larger filtration area compared to what is possible in a lauter tun yields are up to 13 brews/24 h. The higher capacities in all three alternatives are gained, however, at the expense of higher extract losses and water consumption. 

FT. In a particular instance if we consider a rectangular vessel with... 

In any case deflection of the fully loaded vessel between supports shall not exceed the distance between supports divided by 1000. "The beams should run from one side completely to the opposite. In the case of rectangular vessels, the recommended design is to carry them across the bottom, parallel to the short dimension, and continued out both sides. 

The brick lining (if one is required to provide thermal insulation or mechanical protection to the bag membrane) is then laid within the bag. In cylindrical contoured vessels, properly designed, this type of lining has been moderately successful. It is not often recommended for rectangular shapes since the movement of the wooden walls is somewhat more difficult to control. It is important that, in such cases, the walls be adequately braced externally to prevent movement. The bands on cylindrical tanks and tie rods of rectangular vessels should be adjusted to the proper tension prior to the installation of any liner, and bands on the former be secured to shell wall to maintain their positions. 

When cotton goods are to be bleached they are scoured or kier-boiled and then packed into a cylindrical or rectangular vessel which may be made of wood, stone, cement lining, or stainless steel. The vessel has a perforated... 

The tia i ional machine is the Hussong, illustrated in its simplest form in Fig. It consists essentially of a frame carrying poles on which the hanks ar Hung and which can, when loaded, be lowered by a hoist on a gantry, into the rectangular vessel containing the dye liquor. The liquor is circulated by means of an impeller, separated from the yarn by a division... 

It will first be shown how surface tension can be expressed in terms of stresses in the transition layer between liquid and vapor phases by discussing the equilibrium of the sides of a rectangular vessel which contains the liquid under consideration. 

In an algal culture contained in a rectangular vessel of thickness L and irradiated from one side (/ = / at a = 0), the light intensity may be assumed... 

Side plates, rectangular vessels. UW-13. Appx I3 Opening in fiat heads. UG-39 Welced flat heads. UG-34. UW-i3. ULW-17 Corner joints. UG-93. UW-9.13.18 Cat. S circumferential joints, UW-2.3.9 12 33. 

The 40 Nm /h-class membrane reformer has a structure in which multi-reactor tubes are packed in the rectangular vessel. TGC made a few modifications to the first membrane reformer, which attained an efficiency level of 76.2%. The second membrane reformer increased the number of membrane modules from 224 to 256, in order to operate the system for higher methane... 

Sedimentation vessels are typically either rectangular or circular in shape, and provide for feed of the wastewater, removal of a solids concentrate, and removal of a clarified effluent. It is also common to recycle a proportion of the solids concentrate back into the feed side of the vessel in order to help seed precipitation reactions and aid in the settling. A rectangular vessel allows for efficient use of space and facilitates an efficient inlet design that provides for even spreading of the influent. A circular vessel makes for less efficient use of space and a more complicated inlet design, but is typically designed with a conical bottom and scraper that facilitates removal of the solids concentrate from the bottom. The wastewater in a circular sedimentation basin is introduced into a center well and removed via a weir system at the periphery, such that the particle trajectory is radially outward. 

A rectangular vessel 10 ft wide, 20 ft long, and 12 ft deep is filled with mercury (specific gravity = 13.5). Answer the following questions using the pressure equation P = F A ... 

The bed-to-surface heat transfer coefficient (about 85 280 W/m °C) by solids convection and radiation is lower in circulating bed AFBC than in bubbling bed AFBC due to the lower bed density and vertical heat transfer surface orientation, and the heat transfer coefficient decreases with increased height. The dilute zone of the furnace is water-walled, with the heat transfer surfaces placed at the perimeter of the rectangular vessel enclosure. Additional vertical heat transfer surface walls or wing walls may be hung within the vessel to increase its heat removal capacity. Another means to increase the heat transfer surface is to place an exter-... 

FIG. 5-13. Shear wave propagation in a rectangular vessel (from reference 114). 

Experimentally, a disturbance approximating a plane shear wave can be set up by vibrating a plate in a rectangular vessel - (Fig. 5-13) and, provided the... 

The particles are mixed in water at room temperature in a rectangular vessel with a side Z = 20 cm, wherein the water height is // = 150 cm. Determine the fall velocity of each of the three particles. It is postulated that the particles are in sufficiently low concentrations that each particle settles with the fall velocity of an isolated particle. 

Shallow bed model. Fan and coworkers (87,88) have treated the case of shallow reactors (bed height low relative to diameter or length for rectangular vessels). While mixing is rapid in the vertical direction, it tends to be limited in the lateral direction so that the residence time distribution for solids can differ considerably from the perfect mixing assumption adopted in most of the models covered in Sections 7.1 and 7.2. Lateral mixing of both solids and gas is described in terms of lateral dispersion coefficients. Unsteady state terms are retained in order to provide dynamic solutions. In other respects the models are "conventional in their treatment of two phases (bubbles and dense phase). It is shown that lateral... 

Rectangular vessels can oscillate at two different periods. Vessels with an attached measuring chamber can oscillate with at least two different periods. 

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