T-MSK Engineering & Services

Spray Cum Tray Type Deaerator

We have designed, manufactured and supplied as per ASME, HEI, and IS code of practice, more than 245 Deaerators from 6,000 kg/ hr to 595,000 kg/hr and feed water temperature at the outlet of Deaerator ranging from 105 degree C to 182 degree C to all boiler manufactures and also to the power industries in India and abroad.

For proper functioning of any deaerator choosing the right design based on dissolved oxygen and feedwater temperature at the outlet is very important

Deaerator is used to remove dissolved gases from boiler feed water to enable production of high quality of steam for power generation and process requirement.

Special Features of our Deaerator

The Deaerator is vertical spray cum tray with counter flow of steam and water & with horizontal feed water storage tank
In order to accomplish high degree of efficient deaeration, water is sprayed through various spray nozzles arranged below the water header.
Trays are arranged in triangular fashion to increase the resident time for fine deaeration. This arrangement will cut down the amount of phosphate additive and eliminate the need for sulphate or hydrazine additives. This will also reduce the amount of blow down and the cost of chemical treatment
The Deaerator is vertical spray cum tray with counter flow of steam and water & with horizontal feed water storage tank
In order to accomplish high degree of efficient deaeration, water is sprayed through various spray nozzles arranged below the water header.

Trays are arranged in triangular fashion to increase the resident time for fine deaeration. This arrangement will cut down the amount of phosphate additive and eliminate the need for sulphate or hydrazine additives. This will also reduce the amount of blow down and the cost of chemical treatment
For initial start–up/heating up of water, Sparger type arrangement is provided in the feed water storage tank. This arrangement will also prevent hammering effect when the deaerator is actually charged with steam.
At the deaerator storage tank outlet nozzle, a sample point is provided to measure dissolved oxygen content
The pump suction/outlet nozzle of the deaerator storage tank is extend up to the perforated inlet header running along the
length of the storage tank as shown in the drawing. Due to this arrangement no vortex breaker is required. Hence less pressure drop.
LP Dosing line with nozzles at definite intervals have been provided inside the deaerator storage tank
In our design no separate vent condenser is required. The first row of trays are designed to act as the vent condenser.
The deaerator is designed to take care of all working conditions. The turn-down is 10 %.
The only place for flashing steam to go is upwards to the heater. For this to happen safely, the equalizers the balancing the pipes between tank and heaters must be adequately sized.
The vents actually have a dual purpose. Not only do they provide a convenient exit for oxygen laden steam, they also permit the steam in the spray chamber to approach as close to atmospheric pressure as possible. The reason is that the lower the partial pressure, the more readily the sprayed water gives up the dissolved gases it contains

Deaerator

Spray Cum Tray Type Deaerator

Special Features of our Deaerator

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