US 5,405,435 AGranted

Deaerator unit with gravity circulation

OwnerMartin Bekedaminventor

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Abstract

An economical deaerator unit for use in boiler feedwater systems for eliminating non-condensible gases, the unit having a containment vessel with a divided internal chamber with an upper scrubbing section and a lower heating and deaerating section with gases flowing from the lower section to the upper section for venting, and with water flowing from the upper section to the lower section for supply to a boiler system with water circulation in the deaerator unit being accomplished by gravity without a transfer pump.

Claims15

Dependent claims

A deaerator unit for a boiler feedwater and return system comprising:

a containment vessel having an internal chamber with a divider wherein the internal chamber of the containment vessel is divided into an upper scrubbing section and a lower deaeration section, each section being partially filled with water during operation;
a vent in the upper scrubbing section having a passage leading to the atmosphere;
a vent condenser communicating with the upper scrubbing section having a spray nozzle constructed to produce a water spray barrier between the upper scrubbing section and the passage of the vent for preventing steam and water vapor from passing through the vent to the atmosphere;
a water supply circuit connected to the spray nozzle for delivering water to the spray nozzle;
a water return line connected to the vessel and communication with the upper section of the chamber for returning water to the scrubbing section from a boiler feedwater and return system connected to the deaerator unit;
a water supply line connected to the vessel and communicating with the lower section of the chamber, for supplying water to the boiler feedwater system;
a steam supply line connected to the vessel and communicating with the lower section of the chamber, the steam supply line including a steam discharge positioned under water in the lower section when the lower section is partially filled with water during operation;
a water overflow pipe communicating between the upper section and the lower section for maintaining a fixed water level in the upper section, the pipe having a water trap segment preventing flow of gases between the upper section and the lower section through the pipe and having an end positioned under water when the lower section is partially filled with water during operation;
and
a gas transfer pipe communicating between the lower section and the upper section with a pipe segment having an end arranged under water in the upper section when the upper section is partially filled with water during operation and an opposite end arranged above water in the lower section when the lower section is partially filled with water during operation, the transfer pipe having a vapor seal segment between the ends.

7 more elements

Dependencies are inferred from the claim text.

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Abstract

A deaerator unit for a boiler feedwater and return system comprising:

a containment vessel having an internal chamber with a divider wherein the internal chamber of the containment vessel is divided into an upper scrubbing section and a lower deaeration section, each section being partially filled with water during operation;
a vent in the upper scrubbing section having a passage leading to the atmosphere;
a vent condenser communicating with the upper scrubbing section having a spray nozzle constructed to produce a water spray barrier between the upper scrubbing section and the passage of the vent for preventing steam and water vapor from passing through the vent to the atmosphere;
a water supply circuit connected to the spray nozzle for delivering water to the spray nozzle;
a water return line connected to the vessel and communication with the upper section of the chamber for returning water to the scrubbing section from a boiler feedwater and return system connected to the deaerator unit;
a water supply line connected to the vessel and communicating with the lower section of the chamber, for supplying water to the boiler feedwater system;
a steam supply line connected to the vessel and communicating with the lower section of the chamber, the steam supply line including a steam discharge positioned under water in the lower section when the lower section is partially filled with water during operation;
a water overflow pipe communicating between the upper section and the lower section for maintaining a fixed water level in the upper section, the pipe having a water trap segment preventing flow of gases between the upper section and the lower section through the pipe and having an end positioned under water when the lower section is partially filled with water during operation;
and
a gas transfer pipe communicating between the lower section and the upper section with a pipe segment having an end arranged under water in the upper section when the upper section is partially filled with water during operation and an opposite end arranged above water in the lower section when the lower section is partially filled with water during operation, the transfer pipe having a vapor seal segment between the ends.

7 more elements