Technical Guide for Cleaning Electric Heating Thermal Oil Heater Pipelines

This guide explains how to clean electric heating thermal oil heater pipelines.https://8ruiyan.com/en/all-organic-heat-carrier-boilers/ It is a practical resource for maintenance staff. The document describes three main cleaning methods: chemical, mechanical, and hybrid. Each method includes specific use cases and steps.

I. Cleaning Methods and Applicable Scenarios

Chemical Cleaning

• Solvent-Based Cleaners: Use specialized cleaners like KD-L200 or KD-L212. They penetrate, dissolve, and peel off carbon deposits. Effective for thin to thick oil coke layers. No heating is needed.
• Online Cleaners: Add directly during operation. Suitable for lightly contaminated systems. Reduces downtime. Add 5%-10% of system oil volume.

Physical Cleaning

• High-Pressure Water Jets: Use 15-30 MPa water pressure to flush pipelines. Good for large pipes (DN ≥ 200 mm).
• Mechanical Scraping: Use wire brushes or robots. Effective for bends and valves.

Hybrid Cleaning

• First use chemicals to soften deposits. Then use water jets or tools. Increases efficiency by 40%. Best for severe clogging (>3 mm deposits).

II. Standard Operating Procedures

Drain and Purge

• Cool oil below 80°C before draining.
• Purge with 0.6-0.8 MPa air for 30 minutes.

Chemical Cleaning

• Add cleaning agent at 1:1 ratio.
• Run pump 8-12 hours. Keep flow speed ≥1.5 m/s. Check filter every 2 hours.

Physical Cleaning

• Use water jets at 15°-30° angle. Adjust pressure for pipe size.
• Keep tools below 200 rpm to avoid damage.

Final Purge and Oil Refill

• Purge for 1 hour. Ensure cleaner residue <0.1%.
• Dehydrate new oil at 100-120°C for 2 hours.

III. Key Points and Precautions

Безопасность

• Wear protective gear and goggles. Ventilate area well.
• No open flames. Store cleaners at 5-40°C.

Temperature and Time

• Keep temperature ≤60°C during chemical cleaning.
• Finish within 24 hours.

Cleaner Selection

• Use pH-neutral cleaners (6.5-7.5).
• Test compatibility with ASTM D130.

System Check

• Do pressure test at 0.75x design pressure.
• Use endoscope to check. Remove ≥95% deposits.

IV. Maintenance and Prevention

Cleaning Schedule

• Clean every 2 years for light use (<250°C). Clean yearly for heavy use (≥300°C).
• Clean immediately if acid value >1.5 or viscosity changes >15%.

Oil Quality

• New oil carbon residue ≤0.05%. Check monthly. Change oil if >1.0%.
• Add antioxidants to extend oil life.

Operation

• Keep wall temperature ≤50°C above oil film.
• Maintain flow speed ≥2 m/s.

Заключение

Thermal Oil Heater Pipelines require regular cleaning using chemical, physical, or hybrid methods, following strict safety protocols and maintenance strategies for optimal performance.

For further consultation, please contact our technical team for expert advice.

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