How to dispose of the passivation agent after the device is shut down for passivation
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After the desulfurization system is shut down, passivation treatment is required. As for how to dispose of the waste passivator after passivation, those who have information on the properties of passivators are requested to provide assistance. Thank you! :time:
Passivators are generally alkaline solutions that are corrosive and can pollute the environment. They are usually transported to the site in specialized tank vehicles, where they are used for passivation in dedicated tanks; once the passivation process is complete, they are taken away by those tank vehicles for centralized treatment!
(1) Due to the high reactivity and chelation ability of ferrous sulfide, based on this principle, passivators are composed of a mixture of various organic and inorganic substances; these passivators can decompose ferrous sulfide into stable sulfur and iron salts that dissolve in water, thereby removing this substance from the equipment and thus protecting it. (2) Physicochemical properties of the ferrous sulfide passivator: Appearance – dark brown liquid; pH value – 7 to 9; Density – 1.04 to 1.08. (3) The optimal concentration for using this ferrous sulfide passivator is 10%. It is necessary to keep adding the agent as it is used up, in order to maintain a concentration of 10% in the cleaning solution and thus ensure optimal cleaning results. (4) The pH value of the ferrous sulfide passivation cleaning solution reaches 8.5 ； The temperature of the cleaning solution rises to 8°C to 10°C and remains at this level for a certain period of time; once the temperature of the cleaning solution starts to drop, the cleaning process of ferrous sulfide is complete. (5) The high-efficiency passivator for ferrous sulfide, along with the products formed upon reaction with ferrous sulfide, have been tested by the labor health authorities; according to the classification standards for the acute toxicity of chemical substances, they are considered to be slightly toxic substances, with a pH value of
Sweat, we discharged it directly, but while doing so we also increased the flow of fresh water to dilute it； It seems like our factory doesn’t have a specialized process for dealing with these materials after passivation
The purplish-red passivating agent was used during the shutdown process; after passivation was complete, it was neutralized with other reagents before being discharged. We were not involved in this process as it was outsourced, so we are not aware of exactly what reagents were used
Reply to 3# chengp: What is the composition of the passivating agent you mentioned?