Sump tank

A large leak of gas is detected by a low-pressure sensor (PSL) that shuts in the inlet, and a check valve (FSV) keeps gas from downstreant components from flowing backward to the leak. Similarly, a large oil leak is detected by a low-level sensor (LSL) and a check valve. Back-up protection is provided by a sump tank and its high-level sensor (LSH) for an oil leak. That is, before an oil spill becomes pollution there must be a... 

Small Oil Leak Sump Tank (LSH) Manual Observation... 

A hydraulic system must have a reserve of fluid in addition to that contained in the pumps, actuators, pipes and other components of the system. This reserve fluid must be readily available to make up losses of fluid from the system, to make up for compression of fluid under pressure, and to compensate for the loss of volume as the fluid cools. This extra fluid is contained in a tank usually called a reservoir. A reservoir may sometimes be referred to as a sump tank, service tank, operating tank, supply tank or base tank. 

Disposal pile ID is excessive. A sump tank in conjunction with a disposal pile or skim pile is required. 

Water in the seal tank is drawn into the flash evaporators by means of the partial vacuum existing there. The water, in being flashed at a pressure that yields lOO F effluent, falls from the flash evaporators into the sump tank below. From the sump tank the water is once more pumped up to the working reservoir to complete the process water cooling cycle. The reactor heat, liberated in the flash evaporators, is carried away by the cooling tower water circulated through the condenser tubes in the evaporators. 

The seal tank receiving the water from the reactor section and the sump tank receiving the process water from the flash evaporators are enclosed in this building for shielding and instrument main.tenance reasons. The equipment is located on seven main levels so as to obtain building compactness and to achieve proper hydrostatic balance between the seal-tank level, suction lift to the flash evaporators, and barometric discharge to the sump tank. 

Sump Tank. The sump tank has a capacity of 100,000 gal. The primary functions of the sump tank are to receive the process water from the flash evaporators and to supply it to the process-water pumps. The tank normally contains a 3-min holdup of about 60,000 gal. This holdup is necessary for satisfactory operation of the process-water pumps. The additional 40,000 gal capacity of the tank provides for the accumulation of water in the event of failure of the process—water pumps. The sump tank also receives process water via an overflow from the seal tank. 

Plash Evaporators. Flash evaporators are used for cooling the MTR process water because they have been found to be the most efficient and economical of all types of equipment examined. These stainless steel flash evaporators, each 25 ft long and 8 ft in diameter, containing about 5000 X-in. cooling tubes, handle the 20,000-gpm flow and the 30,000-kw heat load of the MTR. The 110 F process water from the reactor is sprayed into the flash evaporators where the absolute pressure is 1.9 in. Tig,which is the eaturation pressure of lOO F steam. Part of the process water evaporates, thereby cooling the bulk of the water, which falls into the sump tank below. The... 

It should abide by follows when assemble the oil filter and oil sump tank (Refer to Figure 8.59and Figure 8.60) ... 

Simple vacuum driers are constructed of heated plates (on which trays containing wet material are placed) fitted in a heavily built metal cabinet with a tightly fitting door. Vacuum is applied by an external pump which often requires a condenser and sump tank to protect it. Generally, the heat transfer to the trays is poor because of uneven contact surfaces and, since under vacuum conditions most of the heat is obtained by conduction, this has a marked effect on the efficiency. 

Size of the process tank relative to rate of inflow of effluent and whether interim storage of material is available. A sump tank (see Figure 12.4) to receive material at times of high production rate can reduce the minimum necessary capacity of the processing tanks, which can continue to process material during periods when the production rate may be low or zero. 

Heat picked up by the water on the shell side of the heat exchanger loop is dumped to the secondary system sump tank. The cooling tower loop then draws its suction from the sump tank and pumps the heated water through a cooling tower located on the roof of the console area. Finally, the cooled water is returned to the sump tank to restart the cooling cycle. 

The secondary system consists of two separate 8-inch carbon steel loops that begin and terminate in the 3,000 gallon sump tank. 

Circulation in the first loop is maintained by the exchanger pump drawing a suction on the sump tank and discharging through a proportioning valve on the heat exchanger. A single pass water flow... 

A tower pump removes heated water from the sump tank and discharges it through an orifice plate and proportioning valve to the Baltimore Aircoil Cooling Tower on the Reactor Lab roof above the console. In the tower, the water is air cooled before being returned by gravity to the coolant sump tank. 

This operates a solenoid valve which bleeds off air from the control valve actuator and allows the valve to close. When the temperature of the sump tank again rises and causes pressure to the control valve controller to increase to a value 7 pounds above the trip point of the Pressuretrol Controller, the solenoid is re-energized allowing full air pressure to reopen the control valve. 

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