Industrial Steam – Tray Type Pressurized Deaerator

Description

Features:

• Counter Flow Tray design deaerator provides guaranteed removal of all dissolved oxygen in excess of 0.005 cc/liter from 5% to 100% of deaerator capacity
• Electronic instrumentation for modulating deaerator level control includes a hart compatible differential pressure transmitter, PID controller, and motorized control valve
• Multiple deaerator configurations: vertical single tank, standard “tank car” type, or flanged heater section, all providing the same high quality deaeration.
• Only stainless steel components come in contact with undeaerated water. Deaerator trays and tray box are all stainless steel
• ASME Code and national board stamped receivers – 50 psi. Standard vessel options include stress relieving, non-destructive testing and full vacuum
• Custom engineered packaged separator system includes boiler feed water pumps and quality components to insure reliable service

Advantages:

• Counter Flow Tray type deaerators are capable of accepting high percentages of condensate returns without adverse effects on performance. This is possible because the deaeration process does not require a flow of steam for scrubbing. All second stage scrubbing is done by the cascading process through the trays. The counter flow design provides maximum performance because the cleanest incoming steam contacts the water that requires final deaeration, thus stripping out the last traces of oxygen.
• Guaranteed deaerator performance from 5% to 100% of load standard sizes ranging from 6,900 lbs/hr to 300,000 lbs/hr
• Custom engineered packaged deaerator system results in a small foot print, minimal onsite installation costs, and a single source of responsibility for all major components.

Operation:

Makeup water is sprayed into the deaerator through a stainless steel spring-loaded nozzle and into a stainless steel internal vent condenser which is located in the mixing section. This incoming water is heated instantly by direct contact with steam. Returned condensate enters the deaerator below the water level to eliminate pressure decay caused by surging returns.

The deaerated water is then pumped into the deaerating section where it is blasted through stainless steel wide angle, full-cone unrestricted nozzles. The last traces of oxygen are shaken out at the source of the purest steam. The pumped transfer rate is approximately 125% of deaerator capacity, which enables the deaerator to furnish the boiler with deaerated water from start up. Deaeration is accomplished from 0% to 100% load, and thermal stratification is eliminated.

Excess deaerated water, which is not required by the boiler, recycles into the deaerating section through the compartment overflow. This deaerated water is blended with makeup water and is constantly rescrubbed. Non-condensable vapors are expelled from the top of the deaerator through the internal vent condenser.