Electric Steam Boiler

Estimated EXW reference prices vary by capacity and boiler configuration:

• LDR Vertical Series (0.07–0.7 MW / 0.1–1 t/h / 0.4–0.7 MPa):USD 5,000 – 16,000
• WDR Horizontal Series (0.2–2.8 MW / 0.3–4 t/h / up to 2.5 MPa):USD 18,000 – 65,000

Prices vary by working pressure, temperature control requirements, and auxiliary scope. Quotes cover boiler body and control panel only (excluding freight). Custom solutions are quoted separately.

Selection depends on installation space, steam requirements, and transportation conditions:

• Vertical LDR Series (0.1–1 t/h):Compact footprint with fast cold starts, ideal for space-limited sites. Can be designed for containerized transportation depending on model dimensions.
• Horizontal WDR Series (0.3–4 t/h):Larger steam space for high steam dryness and stable continuous industrial operation (up to 2.5 MPa). Container transportation options depend on equipment size and project requirements.
• Skid-Mounted Delivery:Both series can be pre-assembled on a steel skid (boiler, control cabinet, pumps, and water treatment equipment) to reduce on-site installation work.

A complete system mainly consists of four parts:

• Pressure Vessel Body:Equipped with flange-mounted electric heating elements.
• PLC & Power Cabinet:Equipped with contactors, SSR/SCR power controllers, and circuit breakers.
• Water & Feed Auxiliaries:Feedwater pumps, automatic water softeners (or RO systems), expansion tanks, and deaerators for high-pressure steam systems where required.
• Safety Instruments:Dual low-water cutoffs, pressure switches, safety valves, and over-temperature protection.

Electric boilers provide:

• Zero site emissions with no chimney required
• Thermal efficiency is typically above 99%
• Accurate power adjustment (stepped or SCR stepless control) for stable pressure and temperature control
• Fully automatic one-touch start/stop operation for unattended operation

Standard LDR series boilers require 20–30 days.

High-power, explosion-proof, or skid-mounted WDR series boilers require 35–50 days, including complete assembly and hydrostatic testing.

Common installation issues include:

• Undersized transformer capacity causing main breaker trips
• Loose electrical lug connections causing terminal bar overheating or arc damage
• Poor protective grounding (PE) causing false RCD trips
• Untreated hard feedwater causing rapid scale buildup
• Insufficient ceiling height preventing vertical heating element removal

Key operating precautions include:

1. Low-Water Testing:Verify low-water cutoffs regularly to prevent dry firing and heating element damage.
2. Feedwater Quality:Maintain strict hardness control (≤0.03 mmol/L) to prevent rapid scale buildup on heating surfaces.
3. Terminal Maintenance:Check high-current terminal lugs and flange bolts regularly to prevent loose connections and arc damage.

Regular maintenance includes measuring insulation resistance with a megger, inspecting scale buildup, and checking phase current balance.

Heating elements should be replaced if insulation resistance falls below the manufacturer’s specified limit, sheath damage occurs, or internal heating wires fail.

For installation and replacement:

• Horizontal WDR heating elements are typically removed through side flanges.
• Vertical LDR heating elements require sufficient overhead clearance for lifting and replacement.

Common issues include:

• Heating element insulation failure causing ground-fault trips
• Phase loss or heavy scaling causing slow heating and thermal protection trips
• Scale buildup on water level probes causing false alarms
• Contactor contact welding
• SSR/SCR overheating or failure caused by insufficient cabinet cooling