What is observation tank?

What is observation tank?

A slotted or screened tube or pipe, positioned vertically in an underground tank excavation, that permits an operator to check conditions in the excavation and, in particular, to determine whether there may be a leak in the tank system.

What is the purpose of observation tank in steam return line?

Observation tank. >> Boiler observation tank receives the dirty condensate. Dirty condensate is nothing but the condensate returning from fuel , lube, purifier heaters, fuel tank, cargo tank heaters etc. This is called dirty condensate and isolated from the clean system.

What is hotwell tank?

noun. a tank or reservoir in which hot water is collected before being recirculated, especially condensed steam about to be returned to a boiler.

What is the function of hotwell?

The condenser hotwell serves as a water reservoir for the turbine cycle. When hotwell level reaches the low point, a valve opens to supply make-up water to the cycle. When hotwell level reaches the high end of the level range, a dump valve opens to move the condensate from the hotwell to a condensate storage tank.

What is boiler cascade tank?

Cascade tank, also known as hot well, is a part of boiler feed water system. Water is pumped into the cascade tank from the feed water tank. The boiler water is treated in the cascade tank and the return from the steam heating system is also connected to the hot well.

What is boiler feed water system?

Boiler feedwater is an essential part of boiler operations. The feed water is put into the steam drum from a feed pump. In the steam drum the feed water is then turned into steam from the heat. The feed water is never open to the atmosphere. This cycle is known as a closed system or Rankine cycle.

What is the important of ballast tank inspection?

The tank inspection is able to demonstrate structural damage, the condition of coatings, the degree of corrosion, and the condition of the internal infrastructure of the tank (pipes, manholes, sensors). …

What is deep tank?

: a portion of a ship’s hold bulkheaded off to hold water.

What is Cascade tank?

What is water hammering in boiler?

Water hammer is a pressure surge or wave caused when a fluid (usually a liquid but sometimes also a gas) in motion is forced to stop or change direction suddenly (momentum change). As soon as steam leaves the boiler, it starts losing heat. This gives rise to the phenomenon of water hammer.

What is the function of Cascade tank?

Boiler Feed Water Tank/ Cascade Tank: Also known as hot well, it supplies hot water feed to the boiler water drum, which is heated to generate steam. The top-up water for the boiler water is supplied to the system via hot well by installing a make-up fresh water (distilled) connection.

What’s Cascade tank?

Why does a boiler need a feed water tank?

In case the hot well overflows, the water goes to the feed water tank, which supplies feed water to the system whenever there is a dearth. A de-aerated type heater is used in the feed water line in order to remove any dissolved oxygen from the water. This is basically done to prevent corrosion of the boiler.

What is the purpose of deaerator tank in boilers?

3: Deaerator tank also acts as a Feed tank which provides Net Positive Suction Head to the feed. What is the purpose of deaerator in boilers? Deaerator helps in reducing dissolved gases to boost thermal efficiency of plant with the help of raising water temperature.

Why is the boiler hot well and Cascade tank fitted?

Describe the boiler hot well and cascade tank. Why is it fitted and how would you trace an oil leak? The boiler hot well is where the condensate drains return from the condenser. This condensate may be contaminated as some of the drains are from f.o.heating systems or tank heating system.

Which is part of the boiler is open to the atmosphere?

While in a high pressurized system, no part of the system is open to the atmosphere. A feed system, is nothing but a cyclic process that takes place between the turbine and the boiler. This cyclic process facilitates the exhausted steam to return to the boiler in the form of feed water.