- 2025-07-22
Humidifier water treatment
Core water quality control objectives
Microbial limit: total bacteria <100CFU/mL (<10CFU/mL for medical use)
Scale control: Langelier index (LSI) <0.5
Conductivity requirements: steam humidification ≤5μS/cm, gasification humidification ≤50μS/cm
Key treatment process system
1. Multi-stage pretreatment unit
Activated carbon adsorption tower (iodine value ≥1000mg/g)
Residual chlorine removal rate >99% (to ensure RO membrane safety)
Organic adsorption amount ≥30mg TOC/g carbon
Precision security filter (5μm melt-blown PP filter element)
Retention rate >99.9% (to prevent particle breakdown)
2. Reverse osmosis host system
Brackish water membrane element (desalination rate ≥99.2%)
System recovery rate: single-stage 60-75%, double-stage 80-85%
Production water conductivity <10μS/cm (25℃)
3. Post-treatment sterilization unit
Ultraviolet disinfection device (254nm, dose 40mJ/cm²)
Continuous antibacterial ozone (0.05-0.1mg/L residual concentration)
Key technical points of project implementation
Anti-biological contamination control:
Full-circulation design of pipelines (flow rate>1.5m/s)
Electrolytic polishing of the inner wall of 304 stainless steel pipe fittings (Ra≤0.6μm)
Scale prevention and control measures:
Online LSI index real-time monitoring
Precise dosing of scale inhibitors (carboxylic acid copolymers, 2-5mg/L)
Water quality assurance in different scenarios
Application scenarios Core indicators Special control requirements
Medical clean room Endotoxin <0.25EU/mL Two-stage RO+EDI continuous flow design
Data center Silicon content <0.5mg/L Special formula for heat exchanger anti-silicon scale
Textile workshop Hardness <0.1mg/L (calculated as CaCO₃) Concentrated water reflux increases recovery rate to 90%
Operation and maintenance key parameters
Membrane cleaning procedures:
Acid cleaning (pH=2 citric acid solution, start when ΔP rises by 15%)
Alkaline cleaning (pH=12 NaOH+0.1%EDTA, mandatory every 3 months)
Consumable replacement cycle:
Pretreatment filter: pressure difference>0.1MPa or 90 days
RO membrane element: standardized flux drop>15%
