Cleaning and Unclogging Process between Plates
Briefly introduces the process of unblocking and cleaning blockages between the plates.
Cleaning and Unclogging Process between Plates
When dust or tar accumulates in the plate channels, pressure drop increases and efficiency decreases. Regular unclogging is crucial for restoring performance.
Clog Types and Corresponding Methods
Clogging Type | Characteristics | Recommended Method |
Dust Deposits | Dry powder | Compressed air backflushing or high-pressure water flushing |
Tar/Organic Matter | Black viscous substance | Pyrolysis (550-700℃) or chemical cleaning |
Mixed Scale | Hardened lumps | Offline high-pressure water flushing + chemical soaking |
Online and offline cleaning
Method | Applicable | Advantages | Disadvantages |
Online Cleaning (Backflushing/Pyrolysis) | Light dust, moderate tar | No need to stop the machine | Limited effect |
Offline Cleaning (Water Rinsing/Chemical Immersion) | Severe clogging | Thorough, can remove damaged parts | Requires machine shutdown |
Chemical Cleaning Reference
Contaminants | Cleaning Agents | Conditions |
Tar/Oil Stains | NaOH 2%-5% | 60-80℃, 2-4 hours |
Scale/Salt Scale | Hydrochloric Acid 3%-10% | Room Temperature, 4-8 hours |
Stubborn Tar | Organic Solvents | Room Temperature Immersion |
Precautions
Stainless steel should not be cleaned with chlorinated acid cleaning agents (such as hydrochloric acid).
Carbon steel is not suitable for acid cleaning.
Waste liquid must be neutralized or recycled.
Damaged plates should be removed during offline cleaning.
Summary
Panel clogging cleaning can be summarized as follows: dust is cleaned with air blowing and water flushing; tar is cleaned with pyrolysis and chemicals; severe clogging is treated offline; pressure drop is the most direct indicator. Proper cleaning is an important means to extend the life of the heat storage body and ensure operating efficiency.