7. 循环中要定时检查清洗剂的有效性，可以使用PH 试纸测定。如果溶液保持在PH值2‐3时，那么清洗剂仍然有效。如果清洗剂的PH 值达到5‐6时，需要再添加适量福世泰克清洗剂。最终溶液的PH值在2‐3时保持30分钟没有明显变化，证明达到了清洗效果。注意:福世泰克清洗剂可以回收后重复使用，排放会造成浪费。
1. Isolate the equipment system and drain the water from the heat exchanger. 2. High-pressure water is used to clean the mud, algae and other impurities in the pipeline, then the closed system is closed. 3. Install ball valve not less than 1 inch 2.54 cm between isolation valve and exchanger, both inlet and outlet shall be installed. 4. Connect a delivery pump and a conduit so that the cleaning agent is pumped in and out from the bottom of the heat exchanger. 5. The required proportion of FUSITEC cleaning agent can be adjusted according to the specific situation. 6. Repeat the cycle until the recommended cleaning time. As the cycle progresses and the sediment dissolves, the gas produced during the reaction increases, and excess air should be vented at any time through a vent valve. As the air is discharged, the space inside the heat exchanger will increase. Appropriate water can be added. Do not start with a large amount of water, which may cause water overflow. Kill. To check the effectiveness of the cleaning agent regularly during the cycle, the Ph test paper can be used. If the solution is kept at a Ph of 2 something 3, the detergent is still effective. If the PH of the cleaning agent reaches 5 something 6, you need to add an appropriate amount of FUSITEC cleaning agent. The PH value of the final solution remained unchanged for 30 minutes at 2 something 3, which proved that the cleaning effect was achieved. Note: FUSITECH cleaning agent can be recycled and reused, emissions will cause waste. 8. After the cleaning time is reached, the cleaning solution is recycled. The exchanger was rinsed repeatedly with water until it was clean and neutral. The Ph value of the exchanger was determined with Ph test paper 6 ~ 7. 9. After the completion of cleaning can start running. You can also suppress the test to see if there is a leak. If there is a leak, you can use meijiahua polymer composite materials for repair and protection, and can greatly extend the service life of equipment. 10. After the equipment is stable, record the current media flow rate, working pressure, heat transfer efficiency and other data. Kill. By comparing the change of the value before and after cleaning, we can calculate the production cost, such as electricity and coal cost, and the improved work efficiency, which is the value compensation of adopting fusitech technology. 12. The same operation method can also be used for plate type, frame type heat exchanger cleaning. 13. If the enterprise needs equipment for passivating pre-film treatment, the following procedures can be followed: The passivating pre-film agent is pumped into the equipment at the recommended dilution ratio while hanging the test piece in the circulation tank; Red Dot method or blue dot method; discharge; Rinse Clean to neutral Ph test paper to determine Ph 6 ~ 7. 14. After passivation prefilming, it is better to use ventilation equipment such as fan to dry the system, which can ensure and enhance the passivation prefilming effect.