What can be used to clean the cooling tower?

Cooling tower cleaning steps 1: Workers who are chemically disinfected and mechanically cleaned should provide correct personal protective equipment (PPE) to ensure that they are exposed to cleaning or disinfection chemicals and water, which may contain Legionella. The tools include: full-body protective clothing, waterproof boots, impermeable gloves, goggles, at least one second-class high-efficiency particulate air filter combined with a full or semi-mask, and a chemical filtering cylinder-type deep breathing protection device. Provide workers with appropriate equipment so that they can safely visit the factory and work safely (such as working at height). Ensure that all operators can complete the task. Use the correct shutdown procedure. Cut off and separate the source of heat load (such as cooler, processing plant). Turn off and isolate the cooling tower/evaporative condenser fan. Cut off the purge system (purge) valve, close the automatic purge controller (if any) and set it as the manual system controller. Open the cooling water valve. The circulating water required by the circulating water pump passes through all areas of the cooling system (including standby chillers, pumps, balance pipelines and dead ends). The second step of cooling tower cleaning: chemical disinfection, whether it is the circulation system of low foam chlorine compatible biological dispersant or low foam bromine compatible biological dispersant. Adding chlorine-based compounds (with detergent properties) achieved a free residual chlorine (FRC) level of at least 65,438+00 mg/L, and then continuously circulated water through the system for one hour, while keeping it not lower than 65,438+00 mg/L, and keeping the pH value of water between FRC 7.0 and 7.6. Measure the FRC and pH value every 15 minutes and record it in the tower cleaning service report. Or add bromine compound (using detergent), and the residual bromine (FRB) is at least 20mg/L ... Then, the continuously circulating water passes through the system for one hour, and the FRB of the pH value of the water is kept between 7.0 and 8.5. Measure FRB and pH value every 15 minutes and record it in the tower cleaning service report. In circulation, high discharge rate is used to remove suspended particles in water. Record the type and quantity of all chemicals used for disinfection plus FRC or FRB and the measurement and results of pH value. Cooling tower cleaning step 3: mechanical cleaning, shut off and isolate the water in the circulating water pump. If necessary, add some sodium bisulfate to the water. Check all areas in contact with water for sediment, silt and scale. Thoroughly clean the water reservoir and fan inlet filter screen with a brush and a water pipe or a high-pressure water cleaner. Clean the contact area of cooling tower water, including basin, pool, filling nozzle and accessories. If possible, clean the contact area in the cooling tower/evaporative condenser of the water cooler. Clean up the loose sediments in the pool and cooling tower pool. Wet environment is easy to damage the bottom basin. Reinstall components and hoses with clean water. If it is moved during work, please make sure to replace it correctly. The fourth step of cooling tower cleaning: start the switch of cooling tower and circulating pump. Check whether the water is clean. If not, repeat steps 2 and 3. Clean the water filter and filter, and then repeat steps 2, 3 and 4 until the water quality is satisfactory. Recover immediately