When the spiral plate heat exchanger is completely unusable, the following are some treatment methods:

1. Diagnosing the cause of the malfunction: First, it is necessary to determine the specific reason why the equipment cannot be used. Possible reasons include severe damage, internal blockage, leakage, etc. For situations where the cause cannot be determined, it is recommended to seek the help of technical personnel for a comprehensive fault diagnosis.

2. Repair or replacement of components: If the cause of the malfunction is determined and repair is feasible, repair or replacement of damaged components can be considered. This may involve replacing sealing rings, cleaning internal channels, repairing or replacing damaged spiral plates, etc. Please ensure that maintenance and replacement work is carried out by qualified technicians.

3. Consider refurbishing or refurbishing options: If the damage or aging of the spiral plate heat exchanger is severe and cannot be solved through simple repairs, refurbishing or refurbishing can be considered. This may include redesigning or replacing internal components to restore their functionality and performance. Renovation or refurbishment work requires experienced technicians to perform.

4. Disposal of waste equipment: If the equipment cannot be repaired or is economically unreasonable, it can be considered as waste equipment for disposal. Abandoned equipment should be disposed of in accordance with local regulations, including dismantling and separating recyclable parts, handling hazardous substances and waste, etc.

It should be noted that when handling spiral plate heat exchangers, relevant environmental and safety regulations should be followed to ensure the safety of operators, and appropriate disposal of equipment should be carried out to reduce negative impacts on the environment.