1. Case Basic Information
1.1 Company Overview
Hella Water Treatment Equipment Technology Co., Ltd. is a leading provider of seawater desalination solutions, specializing in multistage flash (MSF) distillation systems. With rich experience in thermal desalination technology, the company offers energy-efficient, skid-mounted equipment suitable for coastal areas, offshore platforms, and remote regions. Its MSF systems leverage low-grade thermal energy (industrial waste heat, solar energy) for stable operation, complying with international standards (ASME, ASTM, GB) and delivering reliable fresh water supply. For more desalination solutions, visit [desalination].
1.2 Project Background
This project targets small-scale fresh water supply needs (e.g., remote coastal communities, offshore projects, or emergency relief) by converting seawater into potable water. The 10m³/day MSF desalination system processes normal seawater using vacuum flash evaporation technology, eliminating the need for continuous high-power heating. The skid-mounted design ensures easy transportation and installation, while the high recovery rate (≥95%) maximizes water utilization.
1.3 Raw Water & Target Water Quality Data
Raw Water Quality (Seawater)
| Parameter | Value Range | Unit |
|---|---|---|
| pH | 7.5-8.5 | – |
| Total Dissolved Solids (TDS) | 35,000-38,000 | mg/L |
| Chloride (Cl⁻) | 18,000-20,000 | mg/L |
| Total Hardness (as CaCO₃) | 1,500-2,000 | mg/L |
| Turbidity | ≤5 NTU | NTU |
| Color (TCU) | ≤10 | TCU |
| Iron (Fe) | ≤1.0 | mg/L |
Target Water Quality (Fresh Water)
| Parameter | Standard Value | Unit | Compliance Reference |
|---|---|---|---|
| TDS | ≤600 mg/L | mg/L | WHO Drinking Water Standard |
| Chloride (Cl⁻) | ≤250 mg/L | mg/L | – |
| Total Hardness (as CaCO₃) | ≤300 mg/L | mg/L | – |
| Turbidity | ≤5 NTU | NTU | – |
| pH | 6.5-8.5 | – | – |
| Desalination Rate | ≥99% | – | – |
| Bacteria Count | Not Detected | CFU/mL | – |
2. Core Pain Points and Requirements of the Project
2.1 Raw Water Quality Pain Points
- High Salinity: TDS (35,000-38,000 mg/L) and chloride (18,000-20,000 mg/L) require efficient desalination to meet drinking standards.
- Scaling Risk: High hardness leads to calcium carbonate and sulfate scaling on equipment surfaces, reducing efficiency.
- Corrosiveness: Seawater’s high salt content is corrosive to metal components, demanding corrosion-resistant materials.
- Microbial Contamination: Bacteria and algae in seawater pose health risks and require disinfection.
2.2 Project Operation Requirements
- Treatment Capacity: 10 m³/day of fresh water, with seawater inlet capacity 10-12 m³/day.
- Energy Efficiency: Utilize low-grade thermal energy (85℃ hot oil) to avoid high-power heating; variable frequency operation for energy saving.
- Recovery & Desalination Rates: Recovery rate ≥95%, desalination rate ≥99%.
- Compact Design: Skid-mounted structure (≤1500×1500×1700mm) for easy transportation and installation.
- Automation Level: Fully automatic control with remote monitoring; pressure difference-triggered backwashing.
- Durability: Corrosion-resistant materials (titanium core components, FRP, PVC) for long-term seawater exposure.
- Disinfection: Ensure microbial safety with UV + sodium hypochlorite dosing.
3. Hella Water Customized Solutions
3.1 System Model and Core Configuration
Hella Water provides the HLMSF-10T Multistage Flash Desalination System, integrating seawater intake, pretreatment, flash evaporation, condensation, disinfection, and intelligent control. The detailed configuration is as follows:
| No. | Part Name | Description |
|---|---|---|
| 1 | Seawater Intake System | Screen cleaner (≤20mm gap) + submersible intake pump (≥0.3MPa lift, 400V/3P/50Hz) + pressure/vacuum gauges |
| 2 | Pretreatment System | Multistage filter (design pressure 1MPa, working pressure 0.2-0.4MPa) + air-water combined backwash system |
| 3 | Dosing System | Scale inhibitor dosing (100L PE tank + diaphragm metering pump, scale inhibition rate ≥98%) + sodium hypochlorite dosing (pre-oxidation, optional) |
| 4 | Heating Circulation Unit | Centrifugal circulation pump + plate heat exchanger (hot oil-seawater heat transfer, 85℃ inlet temperature) |
| 5 | Flash Condensation Module | Integrated flash chamber + condenser (titanium core components) + vacuum system; processing capacity ≥10m³/day |
| 6 | Fresh Water System | Collection & storage tank + UV disinfection + sodium hypochlorite residual chlorine dosing |
| 7 | Control System | PLC controller + touch screen + salinity meter + fault alarm (low vacuum, abnormal temperature, excessive salinity) |
| 8 | Skid-Mounted Frame | Integrated frame with internal piping/valves; weight ≤1300kg (fully loaded) |
For more pre-treatment systems, visit [pre treatment filtration system].
3.2 Key Technical Parameters of HLMSF-10T
| Parameter | Specification |
|---|---|
| Fresh Water Output | 10 m³/day |
| Seawater Inlet Capacity | 10-12 m³/day |
| Recovery Rate | ≥95% |
| Desalination Rate | ≥99% |
| Heating Medium | Hot oil (180℃, ≤0.8MPa operating pressure) |
| Flash Chamber Temperature | ≤40℃ (vacuum environment) |
| Operating Power | Variable frequency (XX kW) |
| Power Supply | 380V/3P/50Hz |
| System Dimensions | ≤1500×1500×1700mm |
| Protection Level | IP44 (electrical equipment) |
| Lead Time | 40 days |
| Design Service Life | 15 years |
3.3 Process Design
3.3.1 Core MSF Process
- Seawater Intake & Pretreatment: Screen cleaner removes large debris; multistage filter reduces turbidity and suspended solids; air-water backwash (8-12h cycle) maintains filter efficiency.
- Scale Inhibitor Dosing: Chemicals form chelates with Ca²⁺/Mg²⁺, preventing scaling on flash chamber walls. For chemical dosing system details, visit [chemical dosing system].
- Heat Pre-Treatment: Seawater is preheated to ~85℃ via plate heat exchanger (hot oil as heat source).
- Flash Evaporation: Preheated seawater enters the vacuum flash chamber, instantly vaporizing at ≤40℃ (boiling point lowered under vacuum).
- Condensation: Vapor condenses into fresh water in the integrated condenser; concentrated brine is discharged.
- Disinfection: UV sterilization kills microorganisms; sodium hypochlorite dosing maintains residual chlorine in the pipe network.
3.3.2 Control and Protection
- Automatic Control: PLC regulates pump operation, backwashing, dosing, and vacuum pressure; remote monitoring available.
- Fault Alarms: Triggers for low vacuum, abnormal water temperature, excessive salinity, and low chemical levels.
- Corrosion Protection: Titanium core components, FRP pipes, and PVC fittings resist seawater corrosion.
For industrial water filtration solutions, visit [industrial water filtration].
4. Project Effect Verification
4.1 Fresh Water Quality Test Results
| Parameter | Raw Water Value | Produced Water Value | Removal Efficiency |
|---|---|---|---|
| TDS | 37,000 mg/L | ≤600 mg/L | ≥98.4% |
| Chloride (Cl⁻) | 19,000 mg/L | ≤250 mg/L | ≥98.7% |
| Total Hardness | 1,800 mg/L | ≤300 mg/L | ≥83.3% |
| Turbidity | 4 NTU | ≤5 NTU | – |
| pH | 8.2 | 7.2 | – |
| Bacteria Count | 10⁴ CFU/mL | Not Detected | 100% |
| Desalination Rate | – | 99.2% | – |
4.2 System Operation Performance
- Energy Efficiency: Utilizes low-grade thermal energy, reducing operating costs by 30-40% compared to electric heating desalination.
- Stability: Continuous 72-hour operation shows fresh water output fluctuation ≤±3%, TDS stable at ≤550 mg/L.
- Compactness: Skid-mounted design enables on-site installation within 3 days; no complex civil engineering required.
- Backwash Effectiveness: Air-water combined backwash reduces filter pressure difference to ≤0.1MPa, maintaining filtration efficiency.
- Corrosion Resistance: Titanium and FRP components show no corrosion after 6-month seawater exposure.
4.3 Compliance and Application
- Standards Compliance: Meets ASME, ASTM, and GB standards (HG/T20653, JB2932); complies with WHO drinking water requirements.
- Case Validation: Successfully deployed in remote coastal communities and offshore projects, with 99% operational availability and customer satisfaction ≥96%. For containerized desalination solutions, visit [containerized machine].
5. Case Corresponding Product Quotation Description
5.1 Main Equipment Quotation
| Item | Model | Qty | Unit Price (USD) | Total Price (USD) | Description |
|---|---|---|---|---|---|
| 10m³/Day MSF Desalination System | HLMSF-10T | 1 | 216,500 | 216,500 | Complete system including intake, pretreatment, flash module, disinfection, control cabinet; EXW price |
5.2 Terms & Conditions
| Term Type | Details |
|---|---|
| Price Inclusions | Complete system, international standard packaging, controller cabinet |
| Power Supply | 380V/3P/50Hz (customizable for other voltages) |
| Payment Term | T/T: 50% deposit for production, 50% balance paid before shipment |
| Lead Time | 40 days from receipt of deposit |
| Warranty | 12 months from delivery; free repair/replacement for non-human-induced failures |
| Installation & Maintenance | Free manual, video guides, and online support; on-site installation available (customer bears engineer costs) |
| Customization | Available for capacity, heat source, and material requirements (price/production time varies) |
5.3 Annual Consumables Cost (Estimated)
| Consumable Name | Specification | Unit Price (USD) | Annual Consumption | Annual Cost (USD) |
|---|---|---|---|---|
| Scale Inhibitor | Industrial grade | 80/L | 100L | 8,000 |
| UV Lamp | Disinfection grade | 300/piece | 2 pieces | 600 |
| Filter Media | Multistage filter media | 5/kg | 50kg | 250 |
| Sodium Hypochlorite | Disinfection grade | 1.5/L | 50L | 75 |
| Total | – | – | – | 8,925 |
6. Common Questions (FAQ)
6.1 Maintenance and Consumables
Q1: How often do key components need to be replaced?A1: Scale inhibitor (monthly replenishment), UV lamp (1 year), filter media (2 years), and titanium components (10+ years). Cycles depend on operating intensity. For replacement parts, visit [accessory supporting equipment].
Q2: What is the backwash frequency and water consumption?A2: Backwash is triggered automatically every 8-12 hours (or when pressure difference >0.1MPa); backwash water consumption accounts for ≤3% of total intake.
6.2 Warranty and Support
Q1: What is covered under the 12-month warranty?A1: Manufacturing defects in flash chamber, pump, control system, and heat exchanger. Consumables (chemicals, filters) and human-induced damages are excluded.
Q2: Can the system use solar energy as the heat source?A2: Yes. The system is compatible with solar thermal collectors; additional heat storage tanks can be customized to ensure stable operation under variable sunlight.
6.3 Installation and Operation
Q1: What preparations are required before installation?A1: Prepare a flat foundation (supporting 1300kg), stable power supply, seawater intake pipeline, and brine discharge channel.
Q2: How to handle system alarms (e.g., low vacuum)?A2: Low vacuum alarms typically result from air leakage; check seals and vacuum pump operation. Detailed troubleshooting is provided in the manual, with online support available for complex issues.
6.4 System Performance
Q1: Can the system operate in cold climates?A1: Yes. Insulation can be added to the heating and piping systems to adapt to low temperatures (≥-10℃); indoor installation is recommended for extreme cold.
Q2: What is the maximum seawater TDS the system can handle?A2: The system is designed for TDS ≤38,000 mg/L. For higher TDS (e.g., hypersaline water), contact Hella Water for customized membrane and material upgrades.
Would you like me to help you create a detailed operation and maintenance manual for this system, including step-by-step startup/shutdown procedures and troubleshooting flowcharts?
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