Application of citric acid in cleaning
Jan 05, 2024
1. Citric acid cleaning mechanism
Citric acid has little corrosion to metal and is a safe cleaning agent. Since citric acid does not contain Cl-, it will not cause stress corrosion of equipment. It can complex Fe3+ and weaken the promotion effect of Fe3+ on corrosion. Citric acid can dissolve iron oxide and copper oxide to form lemon iron and copper complexes. If ammoniated citric acid solution is used, it can form ferrous ammonia citrate and ferric citrate complexes with high solubility. The cleaning effect is Very good. Citric acid is mainly used to remove rust, so it is mainly used to clean newly-built boilers. When mixed with sulfamic acid, glycolic acid or formic acid, citric acid can be used to clean calcium, magnesium scale and rust in boilers. Citric acid and ethylene glycol can Aminetetraacetic acid (EDTA) is mixed and can be used to clean the superheater. Citric acid and its derivatives have broad uses in many fields such as chemical cleaning due to their special physical and chemical properties.
2. Clean pipes with citric acid
This is the latest cleaning technology for hard water with high impurities. It uses food-grade citric acid to soften stubborn scale, and then uses a microcomputer to control water flow and pneumatics to produce water flow oscillation, which peels off the old scale in the water pipes, leaving the water pipes smooth and clean.
3. Use compound surfactant to clean gas water heaters
Use chemical cleaning agents prepared from citric acid, AES and benzotriazole to clean gas water heaters that have been used for many years. Inject the cleaning agent into the inverted water heater. After soaking for 1 hour, pour out the cleaning solution, rinse it with clean water, and reuse the water heater. Under the same flow rate, the outlet water temperature increases by 5°C to 8°C.
4. Clean the water dispenser
Dilute edible citric acid (powder) with water, pour it into the heated inner tank of the water dispenser, and soak for about 20 minutes. Finally, rinse the inner tank repeatedly with clean water until it is clean. It is non-toxic and effective.
