Vent Condenser for Deaerator Systems

Product Specifications

Technical details and manufacturing context for Vent Condenser

Definition

The vent condenser is an integral part of a deaerator system, specifically designed to condense steam and non-condensable gases (such as oxygen and carbon dioxide) that are vented from the main deaeration chamber. It serves to recover latent heat from the vented steam, improving thermal efficiency, and to separate and remove non-condensable gases from the system, ensuring the production of high-purity, oxygen-free feedwater for boilers or other industrial processes. The unit is typically a shell-and-tube or plate-type heat exchanger. Cooler feedwater or another cooling medium flows on one side, causing the steam to condense on the heat transfer surfaces. The condensate is returned to the system, while the separated non-condensable gases are vented to the atmosphere or a gas removal system. This process utilizes condensation to recover heat and physically separate gases based on their condensability. The vent condenser is available in various configurations, with heat transfer areas ranging from 2 to 20 m², design pressures from 0.6 to 1.6 MPa (per GB/T 150), and design temperatures from 150 to 200°C (per GB/T 150). Cooling water flow rates typically range from 5 to 50 m³/h, with inlet temperatures between 20 and 35°C. Materials of construction include stainless steel (e.g., 304, 316) and carbon steel, with tube materials often specified as 304/316L (ASTM A312) and shell materials as Q345R/304 (GB/T 713). Tube diameters range from 19 to 25 mm, with wall thicknesses from 1.5 to 2.5 mm (per GB/T 151). Overall dimensions vary, with lengths from 1000 to 4000 mm, and weights from 200 to 2000 kg. Leak test pressure is typically 1.5 times the design pressure (per GB/T 150). These values are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier.

Working Principle

Vented steam and gases from the deaerator are directed into the vent condenser, which is typically a shell-and-tube or plate-type heat exchanger. Cooler feedwater or another cooling medium flows on one side, causing the steam to condense on the heat transfer surfaces. The condensate is returned to the system, while the separated non-condensable gases are vented to the atmosphere or a gas removal system. This process utilizes condensation to recover heat and physically separate gases based on their condensability.

Common Materials

Stainless Steel (e.g., 304, 316), Carbon Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Heat Transfer Area	2–20 m²	Select based on vent steam flow rate
Design Pressure	0.6–1.6 MPa	Shell and tube sideGB/T 150
Design Temperature	150–200 °C	Max. operating temperatureGB/T 150
Cooling Water Flow Rate	5–50 m³/h	Based on heat load and ΔT
Cooling Water Inlet Temperature	20–35 °C	Higher inlet reduces condensation rate
Tube Material	304/316L	Corrosion resistanceASTM A312
Shell Material	Q345R/304	Carbon steel or stainlessGB/T 713
Tube Diameter	19–25 mm	Common sizesGB/T 151
Tube Wall Thickness	1.5–2.5 mm	Pressure and corrosion allowanceGB/T 151
Overall Dimensions (L×W×H)	1000–4000 mm	Length range; width and height vary
Weight	200–2000 kg	Depends on size and material
Leak Test Pressure	1.5×design MPa	Hydrostatic testGB/T 150

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Condenser Shell/Body
The main pressure vessel that contains the heat exchange elements and the vented steam/gas mixture.

Material: Carbon Steel or Stainless Steel
Tube Bundle (for shell-and-tube type)
A series of tubes through which the cooling medium flows, providing the surface for steam condensation.

Material: Stainless Steel (e.g., 304, 316)
Plates (for plate-type) Part
Corrugated plates that form channels for the cooling medium and vented steam, creating a large heat transfer surface area.

Material: Stainless Steel (e.g., 316)
Vent Gas Outlet Part
A nozzle or connection that allows the separated non-condensable gases to be discharged from the condenser.

Material: Carbon Steel or Stainless Steel
Condensate Drain Part
An outlet that returns the condensed steam (water) back to the deaerator or feedwater system.

Material: Carbon Steel or Stainless Steel

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Deaerator

View system integration details

Manufacturers of Vent Condenser

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Frequently Asked Questions

What is the primary function of a vent condenser in a deaerator system?

The vent condenser condenses steam and non-condensable gases vented from the deaerator, recovering latent heat and removing gases like oxygen and carbon dioxide to ensure high-purity feedwater.

What are typical design parameters for a vent condenser?

Typical reference ranges include heat transfer area 2–20 m², design pressure 0.6–1.6 MPa, design temperature 150–200°C, cooling water flow 5–50 m³/h, and inlet temperature 20–35°C. These must be confirmed for the specific model.

Which materials are commonly used for vent condensers?

Common materials include stainless steel (304, 316) and carbon steel. Tube material may be 304/316L per ASTM A312, and shell material Q345R/304 per GB/T 713. Verify with supplier.

How should I verify the suitability of a vent condenser for my application?

Check the vent steam flow rate, cooling water availability, and required heat recovery. Confirm all parameters such as heat transfer area, pressure, temperature, and materials with the legal manufacturer or supplier.

Data Basis

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Preliminary Technical Classification

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pressure:	Up to 10 bar (145 psi) typical, vacuum to moderate pressure
flow rate:	Varies by design; typically sized for 0.5–5 m³/h steam vent flow
temperature:	Up to 150°C (302°F) typical, depending on material
slurry concentration:	Not applicable; designed for steam and non-condensable gases, not slurries

Vent Condenser

Product Specifications

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