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Product Thermal Capacity: 1 - 20 t/h
Working Pressure: 0.7 - 2 Mpa
Product Thermal Capacity: 20 - 110 t/h
Working Pressure: 1.25 - 5.3 Mpa
Product Thermal Capacity: 2 – 20t/h
Working Pressure: 1 - 2.5 MPA
Product Thermal Capacity: 4 - 35 t/h
Working Pressure: 1.0 - 2.5 MPA
A deaerator preheats boiler feedwater and removes dissolved gases, especially oxygen and carbon dioxide. These gases are undesirable because they cause corrosion and increase treatment chemical requirements. Operation. Deaerators operate based on the reduced solubility of dissolved gases as temperature increases.
Deaeration is done by spraying the boiler feed water over multiple layers of trays designed to provide large contact area of the liquid surface to Pegging steam. This scrubbing steam is fed from the bottom of the deaerator when it contacts with BFW, it heated up to saturation temperature dissolved corrosive Gases released from feed water with some vapors from the vent valve.
Only a small quantity of steam is venting from deaerator. Most of the steam condenses and becomes the part of deaerated water. It heats the boiler feed water up to the saturation temperature so that solubility of unwanted dissolved gases are decreases. How Does a Deaerator Work?
Deaerators (DAs) are recommended when the steam system requires significant volumes of make-up water that must be treated to remove free oxygen and carbon dioxide from boiler feedwater. Precision Boilers’ Tray-Type DA is the best choice for large stream flows where limited condensate return creates a large demand for makeup water.
Steam, produced in the boiler at 10 bar g, is to be used as the heating agent. If the ‘From and At’ rating of the boiler plant is 10 tonne/h, determine the flowrate of steam required to heat the deaerator. Before any calculations can be made to estimate the size of the deaerator, it is important to know the maximum likely feedwater requirement.
Mar 17, 2015· Inlet Steam Mass Flow = Additional Energy Flow Needed / ( Inlet Steam Specific Enthalpy - Inlet Water Specific Enthalpy) Inlet Water Mass Flow = Total DA Mass Flow - Inlet Water Mass Flow; Assumptions. The Deaerator (DA) Vent Rate is a percent of feedwater flow. The feedwater leaves the DA as a saturated liquid at DA pressure.
Deaerators are typically elevated in boiler rooms to help create head pressure on pumps located lower. This allows hotter water to be pumped without vapor locking should some steam get into the pump. Reason to Deaerate. The most common source of corrosion in boiler systems is dissolved gas: oxygen, carbon dioxide and ammonia.
Deaerator Systems for Boiler Rooms Products > Find Your Commercial or Industrial Boiler > Boiler Room Ancillary Equipment > Boiler Deaerator Systems > Deaerator Systems The Superior Boiler Deaerator Systems are Complete Packaged Systems, designed, built and stamped in accordance with the ASME code for 50 PSIG.
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