I’m really asking for help. Reasons for high chloride ions in softened water
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Testing parameters: Tap water indicators, soft water indicators. Total hardness: 361.06 mg/L vs. 114.69 mg/L; Ca2+: 114.69 mg/L vs. 63.72 mg/L; Mg2+: 246.37 mg/L vs. 50.97 mg/L. Total alkalinity: 655.69 mg/L vs. 623.96 mg/L; Chloride ions: 63.41 mg/L vs. 6324.53 mg/L; Conductivity: 1402 us/cm vs. 12300 us/cm; pH value: 7.50 vs. 7.25. Help needed: 1. The chloride ion level in the soft water is 6300. What could be the reasons for such a high level of chloride ions in the soft water? (If it’s due to resin softening, where is it?) ) 2. Is there a relationship between chloride ions and pH? 3. What are the standards for various indicators of soft water?
It is possible that during the regeneration of the ion exchanger, the \"forward washing\" step was not carried out thoroughly, leaving residual sodium chloride in the resin; this results in a high level of chloride ions in the softened water as well as an increased conductivity.
2. Is there a relationship between chloride ions and pH? 3. What are the standards for various indicators of soft water? Could you answer these two questions? Thank you
Requirements for water quality in boiler water softening equipment – Standards for water quality in the People’s Republic of China – Water quality for industrial boilers. Standard of the People’s Republic of China GB1576 – 2001: Water quality for industrial boilers, replacing GB1576 – 1996. Approved by the State Bureau of Quality and Technical Supervision on January 10, 2001; implemented on October 1, 2001. 1. Scope: This standard specifies the requirements for water quality during the operation of industrial boilers. This standard applies to fixed steam boilers and dual-purpose steam and water boilers that use water as the working medium, with a rated outlet steam pressure of 2.5 MPa or less. It also applies to fixed pressurized hot water boilers and atmospheric pressure hot water boilers that use water as the working medium. II. Water Quality Standards 1. For feed water in steam boilers and dual-purpose steam and water boilers, external chemical water treatment is generally required, and the water quality shall meet the specifications in Table 1. Table 1: Parameters Feed Water Boiler Water Rated Steam Pressure, MPa ≤ 1.0 > 1.0 > 1.6 ≤ 1.0 > 1.0 > 1.6 ≤ 1.6 ≤ 2.5 ≤ 1.6 ≤ 2.5 Suspended Solids, mg/L ≤ 5 ≤ 5 ≤ 5 Total Hardness, mmol/L1) ≤ 0.03 ≤ 0.03 ≤ 0.03 Total Alkalinity, mmol/L2) None With Superheater: 6–26 6–24 6–16 Without Superheater: ≤ 14 ≤ 12 pH (25°C) ≥ 7 ≥ 7 ≥ 7 10–12 10–12 10–12 Dissolved Oxygen, mg/L3) ≤ 0.1 ≤ 0.1 ≤ 0.05 Dissolved Solids, mg/L4) Without Superheater: < 4000 < 3500 < 3000 With Superheater: < 3000 < 2500 SO2-3, mg/L4) 10–30 10–30 PO3-4, mg/L 10–30 10–30 Relative Alkalinity (Free NaOH/Dissolved Solids)5) < 0.2 < 0.2 Oil Content, mg/L ≤ 2 ≤ 2 ≤ 2 Iron Content, mg/L6) ≤ 0.3 ≤ 0.3 ≤ 0.3 Parameters Feed Water Boiler Water Suspended Solids, mg/L ≤ 20 Total Hardness, mmol/L ≤ 4 Total Alkalinity, mmol/L 8–26 pH (25°C) ≥ 7 10–12 Dissolved Solids, mg/L < 5000
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