Return tank

The schematic of the experimental apparatus is shown in Fig. 1. It consists of a supply tank, variable speed gear pump, filter, preheater, flowmeter, test section, and return tank. The supply tank is provided with a preheater (1.5 kW). The return tank is provided with cooling coils and is mounted above the supply tank and is coimected to the supply tank by a valve. An inline filter and an additional inline preheater (700 W) are provided downstream of the pump. The liquid flow rate is measured using the flowmeter provided upstream of the test section. 

The experimental procedure adopted for all test cases is as follows The liquid was first preheated to the required temperature in the supply tank. This liquid was then pumped from the supply tank thorough the filter, preheater, flowmeter, and then into the test section. The fluid exiting the test section was collected in the return tank. The flow rate of the liquid was measured using the flowmeter and was... 

Figure 10.4 Tanks used in a brewery Cleaning-In-Place (CIP) system. Left to right are the prerinse storage tank, the caustic tank and the CIP return tank.

In the second half elution, six bed volumes of fresh eluting solution are used, at 25 gal/min. This is passed to the return tank to become returned eluate for use in the next cycle. 

A displacement wash is given with one bed volume of 0 1 N sulphuric acid to remove chloride ion before the next absorption cycle. The resulting solution is passed to the return tank. 

The system has a hydraulic fluid source that is supplied at a constant pressure to the system. The spool valve can be moved back and forth. When the spool valve is moved in either direction, a port that leads to the hydraulic ram is opened. At the same time on the other side of the ram a port that leads to a hydraulic fluid return tank opens. In actuality, there is really only one port on each side of the hydraulic ram. Each is used as either a supply or a return port depending on the direction the... 

Spool valve is displaced. Figure 11.47 shows how the flow is diverted into the ram or the flow from the low-pressure side of the ram is diverted away from the supply and into the return tank. 

Coolant Return Tank 191 Building Booster Pump Fuel Oil Distribution Electrical Equipment GM Diesel (Pie-2611)... 

Steeping. Sheet, roU, or suitably milled flock pulp is metered into a pulper along with vigorously stirred 18% sodium hydroxide solution at 50°C. The resulting slurry, containing about 5% finely dispersed pulp, passes to a buffer tank from which it is metered to a slurry press that sieves out the swollen fiber and returns the pressings soda for concentration correction and reuse. The cellulose reacts with the soda as a complex alcohol to form the sodium salt or alk-ceU. 

The aqueous grades of hydrazine are packaged in 208-L (55-gal) plastic or lined steel dmms, 1304-L (345-gal) stainless steel returnable tote tanks and... 

A distributor is frequently installed at the top of the column for use during backwash. It collects water evenly and prevents resin from escaping the column should unexpected surges develop in the water flow during backwash. Columns lacking an upper distributor or screen to prevent loss of resin should have an external system to prevent resin from being lost to the drain. It is referred to as a resin trap and may consist of a porous bag that fits over the outlet pipe or a tank designed to lower the linear velocity. Resin drops to the bottom of the tank and is returned to the column when convenient. 

Phenol can be oxidi2ed and hence removed, ie, to levels <20 / g/L, from wastewater (248). Moreover, addition of potassium permanganate to the return activated sludge results in reduction of odors issued from the aeration tanks of conventional activated sludge wastewater treatment plants without any change occurring to the microbiology of the system (249). 

The balance or float tank collects raw milk entering the unit, receives milk returned from the flow-diversion valve that has not been adequately heated, and maintains a uniform product elevation on the pasteurizer intake. 

Some slurry processes use continuous stirred tank reactors and relatively heavy solvents (57) these ate employed by such companies as Hoechst, Montedison, Mitsubishi, Dow, and Nissan. In the Hoechst process (Eig. 4), hexane is used as the diluent. Reactors usually operate at 80—90°C and a total pressure of 1—3 MPa (10—30 psi). The solvent, ethylene, catalyst components, and hydrogen are all continuously fed into the reactor. The residence time of catalyst particles in the reactor is two to three hours. The polymer slurry may be transferred into a smaller reactor for post-polymerization. In most cases, molecular weight of polymer is controlled by the addition of hydrogen to both reactors. After the slurry exits the second reactor, the total charge is separated by a centrifuge into a Hquid stream and soHd polymer. The solvent is then steam-stripped from wet polymer, purified, and returned to the main reactor the wet polymer is dried and pelletized. Variations of this process are widely used throughout the world. 

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