|● First estimate the amount of detergent liquid
|Method 1, According to the condenser heat transfer area and scaling thickness × scale specific gravity after calculating the weight of × 4 is the amount of cleaning agent;
|Method 2, After the volume of the condenser and the volume of the cleaning line, ÷4 is the initial amount of cleaning agent;
|● According to the condenser volume of the condenser, prepare a container for the cleaning agent, which can meet the circulation requirements. The inner surface of the container requires a clean and non-oxidized layer or a non-metallic material container;
|● According to the internal circulation pressure requirements of the condenser, prepare an industrial centrifugal pump for circulation (pressure is not less than 3 kg), prepare the connecting line for the pump and the heat exchanger and the container, and if necessary, make a flange connection;
|● Isolate the equipment system and discharge the water inside the condenser;
|● After high-pressure water is used to clean the sludge, algae and other impurities left in the pipeline, according to the company’s requirements, hang the corresponding test piece in the system to test the dynamic corrosion rate and close the system.
|● Ball valves (not less than DN25) shall be installed between the isolation valve and the exchanger, and the inlet and outlet shall be installed. Connect the transfer pump and connecting pipe to pump the cleaning agent from the bottom of the condenser and out from the top;
|● Start pumping the required Intellilite cleaner into the condenser (the ratio can be adjusted according to specific conditions);
|● Repeated cycle cleaning to the recommended cleaning time. As the circulation progresses and the sediment dissolves, the gases generated during the reaction increase, and excess air should be discharged through the purge valve at any time.
|● With the discharge of air, the space in the condenser will increase, and appropriate water can be added. Do not inject large amounts of water at the beginning, which may cause water overflow;
|● Periodically check the effectiveness of the cleaning agent, you can use PH test strips to determine. If the solution is maintained at pH 2-3, the cleaning agent is still effective.
|● If the pH of the cleaning agent reaches 3 or more, it is necessary to add an appropriate amount of Intellitel cleaner. The pH of the final solution remained unchanged at 2-3 for 30 minutes, demonstrating that the cleaning effect was achieved;
|● After the cleaning time is reached, the cleaning solution is recovered. And rinse the exchanger repeatedly with clean water until it is flushed to neutrality. Use PH test paper to measure PH value 6~7;
|● After the cleaning is completed, it can be turned on. You can also press the test to see if there is a leak;
|● After the equipment is stable, record the current media over flow, working pressure, heat transfer efficiency and other data;
|● Comparing the changes in values before and after cleaning, it is possible to calculate the electricity costs, coal costs and other production costs saved by the company per hour and improve the work efficiency;
|● If the company needs equipment for passivation prefilming, it can be operated according to the following process:
|● The passivation pre-filming agent is pumped into the device at a 0.8% dilution (while the test piece is hung in the circulation tank),
|● After 2 hours of cycle and 1 hour of soaking, the cycle cleaning is carried out for a total of 2 cycles.
|● Continue soaking for about 10 hours (you can extend or shorten the soaking time according to the cleaning requirement)
|● Detection of pre-film effect (carbon steel using the red dot method: copper sulfate reagent does not appear in the red spot within 6 seconds micro-pass, stainless steel using the blue spot method: potassium ferricyanide reagent within 10 minutes, no more than 8 blue spots as qualified) — Emissions — Water flushed to neutral (PH value 6 to 7 with PH test paper);
|● After the passivation of the pre-filming, it is best to dry the system with a ventilating device such as a fan to ensure and enhance the passivation pre-filming effect.
|● Note 1, Safety protection must be done before cleaning, such as wearing goggles, masks, rubber gloves, etc.
|● Note 2, In the cleaning process, if the cleaning agent splashes into the eyes, flush with plenty of water immediately;
|● Note 3, If milk is ingested during the cleaning process, milk should be quoted quickly; During the cleaning process, stainless steel standard test pieces can be hung into the cleaning container for corrosion rate detection;
|● Note 4, After cleaning, the waste liquid can be recycled or neutralized and discharged into the sewage system for disposal.