Customized Corrosion-Resistant Spiral Tubes - ASME Certified

How to prevent low-temperature corrosion?

Maintain feedwater temp > <｜place▁holder▁no▁479｜> + corten steel/coating.

Introduction

Boiler economizers are heat exchange devices with finned tubes that heat a liquid, sometimes water, up to however sometimes doesn't exceed the boiling purpose of liquid. We can manufacture three types of boiler economizer, bare tube economizer, H finned tube economizer and spiral finned tube economizer. H-finned tube economizer is high efficient heat exchanger economizer which is consisted of H-finned tubes.

Compared with bare tube economizer, H-finned tube economizer can enlarge the heat exchange area and reduce the number of tubes. It also can increase the flue gas flow area in order to reduce the flue gas flow speed and abrasion.
H-finned tube can be made as double H finned tubes , with high rigidness to fit long tube row.
The spiral finned economizer is a newly designed heat transfer equipment, consists of spiral fin tubes to overcome the serious abrasion and short service time.

Specifications

Technical specifications

Material Structure
Consists of a serious of spiral fin tubes, the headers of inlet and outlet, bend, frame and other auxiliaries.
Structure Arrangement
In line / staggered arrangement.

Function

1. The economizer, a supplementary steam - generating component in boiler systems, processes exhaust gases from engine cylinders (released via exhaust valves). These gases first enter the boiler, transferring heat to water for initial steam production — the core energy - conversion step.
2. After passing through the boiler, residual heat - carrying exhaust gases flow into the economizer. It captures this waste heat to preheat boiler feedwater. This dual - stage heat recovery boosts steam output, enhances system efficiency by lowering the boiler’s primary energy need, and cuts fuel use.
3. Fundamentally, the economizer acts as a waste - heat recovery system. It repurposes heat (otherwise lost to the atmosphere) to preheat feedwater (common application). This strategic thermal management: reduces energy input for steam generation; and trims fuel costs via leveraging wasted heat.

Variety

Utility Boiler Economizer

HRSG Economizer

Package Boiler Economizer

Manufacturing and acceptance criteria

*Note:HD BOILER can bespoke special type of economizer according to customer's requirement.

Internal heat exchangers

1. Subcooling Through Gas Superheating

2. Dual - Path Heat Transfer

3. Phase Separation Assurance

4. Heat Exchanger Optimization

• Reducing the surface area dedicated to temperature adjustment
• Expanding the volume for phase - change heat transfer, which is critical for cooling capacity