Lord Fin Tube-Membrane boiler economizer

Membrane boiler economizer is similar to finned tube economizer. Membrane economizer is a continuous flat steel diaphragm welded between two straight sections of smooth tube. 

1. Membrane Boiler Economizer Structure:

   - Membrane economizer features a continuous flat steel diaphragm welded between two straight sections of smooth tube.

   - The flat steel diaphragm has a thickness of 2-3 mm.

2. Heat Transfer Efficiency:

   - The heat transfer effect of the diaphragm economizer is superior to that of the smooth tube economizer.

   - Despite better heat transfer, the membrane economizer has less metal content, resulting in lower costs.

3. Operational Advantages:

   - Membrane economizers exhibit light wear and reliable operation.

   - They are easier to clean ash compared to fin economizers.

4. Flue Gas Passage Structure:

   - The tube exhaust of the economizer divides the flue into small longitudinal gas passages.

   - This equalizes the flue gas velocity field, reducing local wear caused by excessive velocity.

5. Ash Neutralization Effect:

   - The diaphragms bypass effect allows for a flow state in the small gas passages, causing large ash particles to be neutralized.

6. Wear Resistance and Replacement:

   - Membrane economizers are gaining attention for their good wear resistance.

   - In many power plants, they are replacing light tube economizers.

7. Manufacturing Requirements:

   - Membrane economizers have higher manufacturing standards, including parallel diaphragm tubes to reduce residual blade welding.

   - Welding requirements include certification without undercut, float welding, gas holes, slag inclusion, etc.

8. Installation Challenges:

   - The rigidity and elasticity compensation ability of the tube row are lower than that of light tube economizers.

   - Ensuring quality during installation, lifting, and transportation is crucial to prevent deformation.

   - Proper tube row arrangement and expansion clearance are necessary for optimal flue gas flow and economizer longevity.

9. Keywords:

   - Keywords related to fin tubes, finned tubes, helical finned tubes, solid fin tubes, serrated finned tubes, and other related terms.

Overall, the membrane boiler economizer is praised for its efficiency, wear resistance, and increasing popularity in power plant applications. The manufacturing and installation processes are highlighted as crucial factors for ensuring optimal performance and longevity.

Membrane boiler economizer