Electric Boiler
Boilers
Electric Boiler
Model: WDR/CWDR Series
1. Product Overview
An electric boiler is clean-energy heating equipment that converts electricity directly into heat, using electric heating elements to raise steam or hot water. The WDR/CWDR series electric boiler uses high-efficiency electric heating elements with no combustion process, zero emissions, no noise, and no smoke, making it an ideal choice for locations with strict environmental requirements. The equipment features compact structure, easy installation, precise control, and fully automatic unattended operation. Particularly suitable for areas without natural gas pipelines, key environmental protection zones, and industries with strict emission limits such as pharmaceuticals, food, and electronics.
Key Features
Rated evaporation 0.05–2 t/h / Thermal power 0.036–1.4 MW
Working pressure 0.4–1.25 MPa
Thermal efficiency ≥98%
Zero emissions, no noise
Fully automatic PLC control, staged startup
3–8 minutes rapid steam generation
Comprehensive safety protections
2. Working Principle
The electric boiler converts electrical energy into thermal energy through immersion-type electric heating tubes. Heating elements are grouped inside the boiler water space and directly heat the surrounding water when energized. For the steam type, water vaporizes at saturation temperature to produce steam, which is output after steam-water separation. For the hot water type, hot water is delivered to the points of use via circulation pumps. The control system uses PLC + touch screen to automatically regulate the number of active heating groups based on pressure or temperature signals, achieving precise power regulation and energy-saving operation. Multiple safety protections include over-pressure, low water, leakage, and over-temperature protection.
3. System Classification
1. By medium: Electric steam boiler (WDR), Electric hot water boiler (CWDR)
4. Detailed Technical Parameters
4.1 Steam Type Main Parameters
| Parameter | Unit | WDR-0.05 | WDR-0.1 | WDR-0.2 | WDR-0.5 | WDR-1 | WDR-2 |
|---|---|---|---|---|---|---|---|
| Rated evaporation | t/h | 0.05 | 0.1 | 0.2 | 0.5 | 1 | 2 |
| Rated pressure | MPa | 0.4/0.7 | 0.4/0.7 | 0.7/1.0 | 0.7/1.0/1.25 | 0.7/1.0/1.25 | 0.7/1.0/1.25 |
| Steam temperature | °C | 152/170 | 152/170 | 170/184 | 170/184/194 | 170/184/194 | 170/184/194 |
| Electric power | kW | 36 | 72 | 144 | 360 | 720 | 1440 |
| Thermal efficiency | % | ≥98 | ≥98 | ≥98 | ≥98 | ≥98 | ≥98 |
| Power supply | — | 3P~380V/50Hz | 3P~380V/50Hz | 3P~380V/50Hz | 3P~380V/50Hz | 3P~380V/50Hz | 10kV/380V |
| Heating groups | — | 2 | 3 | 4 | 6 | 8 | 12 |
| Dimensions (L×W×H) | m | 0.6×0.5×1.5 | 0.7×0.6×1.6 | 0.9×0.7×1.8 | 1.2×0.9×2.1 | 1.6×1.2×2.5 | 2.2×1.6×3.0 |
4.2 Hot Water Type Main Parameters
| Parameter | Unit | CWDR-0.036 | CWDR-0.07 | CWDR-0.14 | CWDR-0.35 | CWDR-0.7 | CWDR-1.4 |
|---|---|---|---|---|---|---|---|
| Rated thermal power | MW | 0.036 | 0.07 | 0.14 | 0.35 | 0.7 | 1.4 |
| Supply water temp. | °C | 85/95 | 85/95 | 85/95 | 95/115 | 95/115 | 95/115 |
| Electric power | kW | 36 | 72 | 144 | 360 | 720 | 1440 |
| Thermal efficiency | % | ≥98 | ≥98 | ≥98 | ≥98 | ≥98 | ≥98 |
| Dimensions (L×W×H) | m | 0.5×0.4×1.2 | 0.6×0.5×1.4 | 0.7×0.6×1.5 | 1.0×0.8×1.8 | 1.3×1.0×2.2 | 1.8×1.3×2.6 |
5. Core Component Selection
| Component | Material/Spec | Recommended Brand | Remarks |
|---|---|---|---|
| Electric heating tube | SS 316L/Incoloy800 | — | Group control |
| Shell | Q245R/Q345R | — | Pressure vessel steel |
| Control panel | PLC + touch screen | Siemens/OMRON | Staged startup |
| Contactor | AC contactor | Schneider/Siemens | Group switching |
| Feed water pump | Vertical multistage | Grundfos/CNP | SS material |
| Safety valve | Full-lift spring type | LESER/Spirax Sarco | Steam type |
| Water level controller | Electrode/float type | — | Dual protection |
| Leakage protector | Residual current device | Schneider | 30mA trip |
6. Typical Application Fields
| Industry | Application | Requirement |
|---|---|---|
| Pharmaceutical | Sterilization, drying, culture | Clean steam 0.2–0.7 MPa |
| Food processing | Cooking, sterilization, drying | Saturated steam 0.3–0.7 MPa |
| Electronics | Clean room humidification | Clean steam 0.2–0.4 MPa |
| Chemical | Reaction heating, distillation | Saturated steam 0.3–1.0 MPa |
| Hotels | Hot water, heating | Hot water 60–95°C |
| Office buildings | HVAC heating | Hot water 60–85°C |
7. Design Standards & Certification
GB/T 16508 — Fire-tube boiler standard
NB/T 47034 — Industrial boiler technical conditions
TSG 11 — Boiler safety technical regulations
JB/T 10393 — Electric boiler technical conditions
ISO 9001 quality management certification
Special equipment manufacturing license
CE certification (optional)
8. Customizable Options
| Option | Description | Remarks |
|---|---|---|
| 10kV high-voltage type | Direct 10kV power supply | No transformer needed |
| Thermal storage system | Off-peak electricity storage | Save 60% on energy cost |
| SS casing | SUS304/316L enclosure | Food/pharma grade |
| Remote monitoring | IoT cloud platform | Mobile access |
| Multi-boiler cascade | Cluster management | Auto rotation |
| VFD feed pump | Load-based regulation | Energy saving 25% |
| Pure steam type | 2-stage separation + filtration | Electronics/pharma |
| Sound enclosure | Noise reduction | ≤55dB |
9. Warranty Terms
Warranty period: 18 months from shipment or 12 months from commissioning. Electric heating tubes warranted for 12 months. Covers material or manufacturing defects. Does not cover consumables or damage from improper operation or water quality issues. Service: free replacement of defective parts, free on-site diagnosis, 24/7 phone support, discounted spare parts after warranty.
10. Packaging & Delivery
| Item | Packaging | Transport Dims | Gross Weight |
|---|---|---|---|
| Boiler main unit | Weatherproof film + steel base | Per model | Unit +5% |
| Control panel | Wooden crate + moisture barrier | 1.2×0.8×0.6m | ~60kg |
| Feed pump | Wooden crate | Per spec | Per spec |
| Accessories | Wooden crate | 0.6×0.4×0.4m | ~20kg |
Lead time: 15–30 working days. Delivery terms: FOB/Shanghai. Documents: Certificate of conformity, operation manual, packing list.
11. Information Required for Inquiry
| No. | Parameter | Description |
|---|---|---|
| 1 | Rated evaporation/thermal power | t/h or MW |
| 2 | Rated pressure | MPa |
| 3 | Steam/hot water temperature | °C |
| 4 | Power supply | V/Hz/kV |
| 5 | Transformer capacity | kVA |
| 6 | Steam/hot water application | Process description |
| 7 | Installation environment | Indoor/outdoor |
| 8 | Thermal storage required? | — |
| 9 | Water quality | — |
| 10 | Other requirements | SS casing, remote monitoring, etc. |