principle

The free CO2 in water can make water acidic, and the reaction is as follows: CO2+H20 day '+C03- day. The H' in water can cause hydrogen depolarization corrosion of metals such as carbon steel, resulting in damage to iron components. The reaction is as follows: H '+2e - H2
Fe - Fe "+2e
Especially in high-temperature and non buffering chemical desalinated water, free CO2 can greatly promote steel corrosion, so it is necessary to suppress this electrochemical reaction. Adding nitrogen to water to increase its pH value can effectively inhibit the dissociation of daily+ions Further control metal corrosion.

Process Overview

This device mainly includes five parts: liquid medicine metering system, dissolution system, metering and dosing system, safety system, and control system.
Nitrogen water is drawn into the metering system through a water injector, and then added to the dissolution system in proportion to mix evenly with desalinated water or condensate water. It is then added to the boiler condensate water or feedwater through a metering system. The dosing control can be done manually It can also be based on the control signal output by the upper system Perform follow-up control and automatic dosing.

scope of application

Boiler condensate and feedwater treatment with medium pressure and above parameters.