Inlet catch

Conveying-screen diyers are fabricated with conveyor widths from 0.3- to 4.4-m sections 1.6 to 2.5 m long. Each section consists of a sheet-metal enclosure, insulated sidew s and roof, heating coils, a circulating fan, inlet-air distributor baffles, a fines catch pan under the... 

Horizontal Blowdown Drum/Catch Tank This type of drum, shown in Fig. 26-16, combines both the vapor-liquid separation and holdup functions in one vessel. Horizontal drums are commonly used where space is plentiful, such as in petroleum refineries and petrochemical plants. The two-phase mixture usually enters at one end and the vapor exits at the other end. For two-phase streams with very high vapor flow rates, inlets may be provided at each end, with the vapor outlet at the center of the drum, thus minimizing vapor velocities at the inlet and aiding vapor-hquid separation. 

In cases where bellows failure would release flammable, toxic or corrosive liquids through the vent, a short nipple and elbow should be used to direct leakage to an open funnel which is piped to grade and ties into a catch basin or manhole with a sealed inlet connection. 

Strainers are used primarily to catch only very large particles and will be found in applications where this type of protection is required. Most hydraulic systems have a strainer in the reservoir at the inlet to the suction line of the pump. A strainer is used in lieu of a filter to reduce its chance of being clogged and starving the pump. However, since this strainer is located in the reservoir, its... 

Figure 8-13 Tangential inlet knockout drum with separate liquid catch tank.

Vertical blowdown drum/catch tank This type of drum, shown in Fig. 23-51, performs the same function and operates on similar princi-les as horizontal separators. These separators are usually used where orizontal space is limited. The two-phase mixture enters the vessel via a nozzle on the vertical shell and is distributed by an inlet baffle chamber. 

Process, chemical, or oily water sewer system branch and lateral lines should enter main lines through vapor-sealed and vented manholes. Branches and laterals in clean or storm water drainage systems may enter main lines without vapor seals if liquid-sealed catch basins are used on the inlets to these branches and laterals. 

Others . When all the inlet and outlet flows and pipes to a vessel have been examined, the guide word other is applied to the process and vessel. This is a catch-all because the pipe-line guide words do not generate all possible hazards. The prompt list (Table 2) lists some of these topics for further consideration. 

Conveying-screen dryers are fabricated with conveyor widths from 0.3- to 4.4-m sections 1.6 to 2.5 m long. Each section consists of a sheet-metal enclosure, insulated sidewalls and roof, heating coils, a circulating fan, inlet air distributor baffles, a fines catch pan under the conveyor, and a conveyor screen (Fig. 12-51). Table 12-23 gives approximate purchase costs for equipment with type 304 staimess-steel hinged conveyor screens and includes steam-coil heaters, fans, motors, and a variable-speed conveyor drive. Cabinet and auxiliary equipment fabrication is of aluminized steel or stainless-steel materials. Prices do not include temperature controllers, motor starters, preform equipment, or auxiliary feed and discharge conveyors. These may add 75,000 to 160,000 to the dryer purchase cost (2005 costs). 

In many experiments described and referenced in Chapter 1 an important role was played by diffusional deposition of nonvolatile molecular species (and of particulate matter) on the surface of gas ducts. First of all, in chromatographic columns, the nonvolatile molecules deposit within a short distance from the inlet and contribute to decontamination of the elements under study from interfering radioactive nuclides. Meanwhile, especially in chemical experiments with the aid of aggressive gases, unwanted aerosols occasionally form. The latter diffuse much more slowly, and when they catch and then carry a fraction of the nonvolatile molecular species, they make the depositional decontamination less efficient. 

A row of diaphragm cells in the cell building of a chloralkali plant. Brine inlet Is visible at the top foreground of first cell, and the sight glasses for level control, plus funnels to catch the broken streams of cell effluent (product) are visible along the right hand side of the row. 

Seals should be provided on all inlets of sewer branches and sewer mains connecting to a catch basin or manhole (see Figures 8-5 and 8-6). A seal should consist of an elbow or a tee with outlet extending downward to provide for a minimum 6-inch seal. Some plants use a special combination seal and cleanout fitting designed to be inserted into the wall of the catch basin or manhole when the concrete is poured. 

A simple seal is provided by running the inlet pipe into the catch basin or manhole at a sharp downward an e so that the upper edge of the inlet pipe is 6 inches below the liquid level in the catch basin or manhole. This method should only be used when the pipe line is reasonably short. Fittings should be removable from inside the catch basin or manhole to permit cleaning and rodding. 

Invert. The invert of the sewer inlet and outlet at a catch basin or manhole should be at the same elevation when both inlet and outlet sewer mains... 

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