Electromagnetic Induction Steam Generators & Industrial Steam Boilers 10–720 kW

Quick Answer: An electromagnetic induction steam generator is an industrial electric steam-generation system that uses electromagnetic induction to generate heat directly inside a conductive metallic heating chamber. Water absorbs this heat and is converted into steam. HLQ induction steam generators are available from 10 kW to 720 kW, with listed steam capacities from 14 kg/h to 1000 kg/h, rated steam pressure of 0.7 MPa and rated steam temperature of approximately 165°C.

HLQ Induction Equipment Co., Ltd. manufactures electromagnetic steam-generation systems for food processing, sterilization, chemical processing, textile production, commercial laundry, industrial cleaning, packaging, reactors and other industrial processes requiring stable and controllable steam.

For additional models and related configurations, visit the HLQ induction steam generator product range.

What Is an Electromagnetic Induction Steam Generator?

An electromagnetic induction steam generator is an electrically powered steam-generation system in which electromagnetic energy is converted into thermal energy directly inside a conductive metallic heating body.

Unlike a conventional electric resistance steam boiler, the induction system does not depend on a resistance heating element as the primary heat source. Instead, alternating current passes through an induction coil and creates a rapidly changing electromagnetic field.

When the conductive metal heating chamber is exposed to this field, electrical currents known as eddy currents are induced inside the metal. Electrical resistance converts these currents into heat.

The metallic chamber therefore becomes the heat-generating body. Water supplied to the chamber absorbs thermal energy from the heated metal and is converted into steam.

Pressure, water level, heating output and operating conditions can then be managed automatically through the electronic control system.

How Does an Induction Heating Steam Generator Work?

The operating process can be summarized as:

Three-Phase Electricity → Power Conversion → Induction Coil → Electromagnetic Field → Eddy Currents → Metal Heating → Water Heating → Steam Generation

1. Electrical input: Industrial three-phase electricity is supplied to the electromagnetic induction controller.
2. Power conversion: Electronic power components convert the incoming electrical supply into controlled alternating-current output.
3. Magnetic field generation: Current passing through the induction coil creates an alternating electromagnetic field.
4. Eddy-current generation: Electrical currents are induced in the conductive metallic steam-generation chamber.
5. Direct heating: Electrical resistance inside the metal converts these currents into thermal energy.
6. Water heating: Feedwater absorbs heat from the metallic heating chamber.
7. Steam production: Additional thermal energy converts the heated water into steam.
8. Automatic regulation: Water level, pressure and temperature signals are monitored and used to control the steam-generation process.

Electromagnetic Induction Heating Principle

The steam generator uses the same electromagnetic heating principle employed in other industrial induction systems.

Alternating electrical current in the induction coil produces a magnetic field. The changing magnetic flux induces eddy currents in the nearby conductive heating body.

The resulting Joule heating can be expressed conceptually as:

P = I²R

Where:

• P = thermal power generated
• I = induced current
• R = electrical resistance of the conductive metal

Actual heating performance also depends on material resistivity, magnetic permeability, operating frequency, coil geometry, coupling distance and the dimensions of the metallic heating chamber.

For a more detailed engineering explanation, read the basic principle of induction heating.

Key Technical Specifications

Engineering Note: Actual steam output depends on feedwater temperature, steam pressure, water quality, operating load, ambient conditions and heat losses. The listed values should therefore be used as model-selection data rather than universal steam-production values under every operating condition.

HLQ Induction Steam Generator Models: 10–720 kW

Steam Connections, Electrical Cable and Machine Dimensions

* Cable cross-section values are product reference data. Final cable size, number of parallel conductors, circuit breaker and electrical protection must be selected according to local electrical regulations, conductor material, cable length, installation method, ambient temperature and permissible voltage drop.

Internal Structure of the Electromagnetic Steam Generator

The induction steam generator integrates the metallic heating chamber, electromagnetic coil, induction power controller, feedwater components, pressure monitoring and safety devices into one system.

The induction coil surrounds the conductive steam-generation chamber. When the controller energizes the coil, electromagnetic energy is transferred to the metal chamber without direct electrical contact between the coil and the water.

Main Components of an Induction Steam Generator

Automatic Steam Pressure Control

A stable industrial steam supply requires the heating power to respond to actual steam consumption.

The pressure transmitter monitors steam-system pressure and sends feedback to the control system. When the pressure approaches the selected operating point, induction heating output can be reduced. When steam consumption increases and pressure falls, heating power can increase again.

This electronic regulation allows the steam generator to respond quickly to changes in process demand.

HLQ also supplies other types of electromagnetic induction heating boilers for water and industrial process-fluid heating.

Automatic Water-Level and Feedwater Control

Water level must remain within the required operating range during steam generation.

High-level and low-level sensors can provide feedback to the controller. When additional water is required, the feedwater system operates according to the control logic. Low-water protection can interrupt heating when safe operating conditions are not maintained.

Typical control and protection functions include:

• High water-level detection
• Low water-level protection
• Automatic feedwater control
• Steam pressure monitoring
• Steam temperature monitoring
• Heating-status indication
• Pump-status indication
• Electromagnetic-valve indication
• Over-pressure protection
• Over-temperature protection
• Electrical fault protection
• Emergency shutdown

Intelligent Electronic Control Panel

The electronic control panel allows operators to monitor steam-generator status and adjust applicable operating parameters.

Depending on the final machine configuration, the control interface can display or indicate heating mode, water level, pressure, temperature, pump operation and alarm conditions.

Key Advantages of Electromagnetic Induction Steam Generation

Direct Electromagnetic Heating

Heat is generated directly inside the conductive metallic heating chamber, creating a short heat-transfer path between the heated metal and feedwater.

Fast Thermal Response

Electronic induction power can be increased or decreased rapidly according to operating requirements.

No Open Flame

The steam generator uses electricity and electromagnetic induction rather than a local gas, diesel, coal or fuel-oil flame.

No Combustion Flue Gas at the Heating Unit

The electromagnetic heating process itself does not create combustion gases.

Automatic Operation

Pressure, water supply, heating output and safety functions can be integrated into an automatic control system.

Compact Installation

The induction unit does not require the conventional burner and combustion chamber associated with fuel-fired boilers.

Continuous Steam Generation

When the system is correctly sized, automatic feedwater and electronic power regulation allow continuous steam production according to process demand.

Induction Steam Generator vs Conventional Steam Boilers

The most economical steam-generation method depends on local electricity price, fuel price, annual operating hours, steam demand, existing infrastructure, maintenance requirements and local emissions regulations.

How to Select the Correct Induction Steam Generator

The most important selection parameter is the required steam consumption in kg/h. Electrical power should then be calculated from the actual steam load rather than selected independently.

Engineering Data Required for Model Selection

To select the correct electromagnetic induction steam generator, provide:

• Required steam output in kg/h
• Minimum steam demand
• Normal steam demand
• Maximum steam demand
• Required steam pressure
• Required steam temperature
• Feedwater temperature
• Feedwater quality
• Continuous or intermittent operation
• Operating hours per day
• Available electrical voltage
• Electrical frequency
• Available transformer capacity
• Steam application
• Installation country
• Applicable boiler or pressure-equipment standard

How to Calculate Required Steam Generator Power

The approximate heating requirement is based on the steam mass flow and the enthalpy increase from incoming feedwater to outlet steam.

P = ṁ × (h_steam − h_water) ÷ η

Where:

• P = required heating power
• ṁ = steam mass flow
• h_steam = specific enthalpy of the required steam
• h_water = specific enthalpy of incoming feedwater
• η = overall heating efficiency

This calculation explains why a steam generator should not be selected only according to electrical power. Feedwater temperature and required steam pressure significantly influence the energy required per kilogram of steam.

Why Feedwater Temperature Matters

Feedwater must first be heated to the saturation temperature corresponding to the operating pressure before evaporation occurs.

Cold make-up water therefore requires more thermal energy than warm condensate return.

Where process conditions allow, returning hot condensate can reduce make-up water consumption and reduce the additional energy required for steam production.

Steam Pressure and Steam Temperature

The standard models listed on this page are rated at approximately 0.7 MPa steam pressure and 165°C steam temperature.

Steam saturation temperature changes with pressure. If a customer requires a different steam pressure, the expected steam capacity and required heating power should be recalculated.

Pressure-rated piping, valves, safety equipment and steam-consuming machinery must also be selected according to the required design pressure.

Saturated Steam vs Superheated Steam

The induction steam generator primarily converts water into process steam. Some applications require steam at temperatures substantially above the saturation temperature.

For these applications, the generated steam can be passed through an induction steam superheater installed downstream.

Industrial Applications of Induction Steam Generators

Food Processing

• Steam cooking
• Food sterilization
• Tofu processing
• Steam boxes
• Jacketed cooking kettles
• Packaging machinery
• Cleaning and sanitation

Chemical and Biochemical Processing

• Chemical reactor heating
• Fermentation vessels
• Jacketed reactors
• Mixing tanks
• Emulsification equipment
• Process heating

Laundry and Textile Processing

• Industrial ironing
• Commercial laundry
• Steam pressing
• Textile finishing
• Dry-cleaning support equipment
• Steam-heated processing equipment

Sterilization

• Sterilization tanks
• Autoclave steam supply
• Equipment sanitation
• Laboratory sterilization
• Process-vessel cleaning

Packaging and Manufacturing

• Steam shrink processes
• Packaging lines
• Industrial cleaning
• Process humidity control
• Manufacturing process heating

Point-of-Use Industrial Steam Generation

An electric induction steam generator can be installed relatively close to steam-consuming equipment in applications where extending a centralized steam network would be difficult or inefficient.

Point-of-use steam generation may be useful for individual production lines, laboratories, cleaning stations or independent process equipment.

Whether point-of-use or centralized steam generation is preferable depends on total steam demand, simultaneous load, electrical infrastructure, piping distance, condensate return and operating strategy.

Induction Steam Generator vs Induction Hot Water Boiler

Not every industrial process requires steam. When the process requires only hot circulating water, a dedicated electromagnetic induction hot water boiler can be more appropriate.

Water Quality and Scale Control

Water quality is an important engineering requirement for every industrial steam-generation system.

Calcium, magnesium and other minerals present in untreated water can form deposits as water is repeatedly heated and evaporated.

Scale can act as thermal insulation, reduce heat-transfer performance and increase metal operating temperature.

Depending on feedwater quality, the installation may require:

• Water softening
• Mechanical filtration
• Reverse-osmosis treatment
• Controlled blowdown
• Periodic cleaning
• Feedwater monitoring
• Condensate recovery

Water-treatment requirements should be selected according to actual feedwater analysis and applicable steam-system standards.

Condensate Recovery

Where process conditions permit, returning condensate can improve overall steam-system performance.

Condensate is normally warmer than fresh make-up water. Returning this hot water to the feedwater system reduces the additional thermal energy required before evaporation.

A complete energy assessment should therefore consider:

• Feedwater temperature
• Condensate return percentage
• Steam-pipe insulation
• Steam distribution losses
• Steam traps
• Operating hours
• Process load variation

Safety Protection

Steam is a high-temperature pressurized fluid. The complete steam system therefore requires multiple protective devices independent of the heating technology.

Typical protection can include:

• Low-water protection
• High-water detection
• Pressure transmitter
• Pressure gauge
• Mechanical safety relief valve
• Over-pressure protection
• Over-temperature protection
• Electrical overload protection
• Phase-loss protection
• Protective grounding
• Automatic fault alarms
• Emergency stop

Important: Industrial steam-generating equipment may be regulated as a boiler or pressure system in the destination country. Applicable design codes, pressure inspections, certifications and safety requirements should be confirmed before final system design.

Electrical Supply Requirements

The standard product data is based on 380 V / 50 Hz / 3 Phase. Other industrial electrical configurations can be evaluated for international projects.

Common project supplies may include:

• 380 V / 50 Hz / 3 Phase
• 400 V / 50 Hz / 3 Phase
• 415 V / 50 Hz / 3 Phase
• 440 V / 60 Hz / 3 Phase
• 460 V / 60 Hz / 3 Phase
• 480 V / 60 Hz / 3 Phase

High-power steam generators represent substantial electrical loads. Transformer capacity, switchgear, circuit protection and incoming power cables should therefore be checked during engineering.

Installation Requirements

When to Use an Induction Thermal Oil Heater Instead

Some industrial processes require operating temperatures higher than those conveniently supplied by saturated steam but do not require steam itself.

In these applications, a thermal fluid can transfer heat to reactors, dryers, rollers or process equipment without operating the process vessel directly at steam pressure.

HLQ also manufactures an induction thermal oil heater for high-temperature indirect process heating.

Steam, Hot Water and Thermal Oil Selection Guide

Electromagnetic Induction Steam Generator Manufacturer

HLQ Induction Equipment Co., Ltd. develops industrial induction heating equipment for steam generation, superheated steam, hot water, thermal-fluid heating and customized process-heating applications.

Steam-generation systems can be engineered according to:

• Required steam output
• Steam pressure
• Steam temperature
• Feedwater temperature
• Water quality
• Operating duty
• Electrical infrastructure
• Installation country
• Applicable pressure-equipment requirements

Frequently Asked Questions About Electromagnetic Induction Steam Generators

What is an electromagnetic induction steam generator?

It is an electrically powered steam generator that uses electromagnetic induction to generate heat inside a conductive metallic heating chamber. The heat is transferred to water to produce steam.

How is an induction steam generator different from a resistance steam generator?

A resistance steam generator produces heat in an electrical resistance element. An induction steam generator produces heat through induced electrical currents inside a conductive metallic heating body.

What power range is available?

The HLQ models listed on this page range from 10 kW to 720 kW.

How much steam can the system produce?

The listed model range covers approximately 14 kg/h to 1000 kg/h under the stated rated conditions.

What is the rated steam pressure?

The standard models listed on this page are rated at approximately 0.7 MPa.

What is the rated steam temperature?

The listed rated steam temperature is approximately 165°C.

Can an induction steam generator operate continuously?

Yes. When the machine, electrical supply and feedwater system are correctly sized, automatic feedwater and induction power control allow continuous steam generation according to demand.

Can steam output be automatically controlled?

Yes. Heating output can be adjusted according to pressure and operating signals, while feedwater operation can be controlled automatically.

Does the induction steam generator use an open flame?

No. The steam generator uses electrical electromagnetic induction heating.

Does it require a chimney?

The induction heating process itself does not generate combustion flue gas, so a conventional combustion chimney is not required for the induction heating unit.

Does feedwater temperature affect steam capacity?

Yes. Warmer feedwater requires less additional energy to reach the steam-generation condition than cold feedwater.

Does water quality matter?

Yes. Poor water quality can produce scale and deposits. Suitable water treatment is recommended for reliable long-term operation.

Can condensate be returned?

Where the process allows safe condensate recovery, returning hot condensate can reduce make-up water consumption and return useful thermal energy to the system.

Can this machine produce superheated steam?

The unit primarily generates process steam from feedwater. When significantly higher steam temperatures are required, a separate induction steam superheater can be added downstream.

Can HLQ supply 60 Hz systems?

Yes, project-specific electrical configurations can be evaluated according to the required local voltage, frequency and three-phase power supply.

Can it supply steam to chemical reactors?

Yes. The steam generator can provide steam to suitable jacketed reactors and process vessels when steam capacity and pressure are properly calculated.

Can it be used for food processing?

Yes, industrial steam can be used for cooking, heating, sterilization and sanitation, subject to the steam-quality and regulatory requirements of the application.

How do I select the correct model?

Provide the required steam output in kg/h, steam pressure, feedwater temperature, operating hours and electrical supply. These values allow a more accurate power and model calculation.

What information is required for a quotation?

Please provide steam output, pressure, required temperature, feedwater temperature, operating time, application, electrical voltage/frequency/phase and installation country.

Request an Electromagnetic Induction Steam Generator Quotation

HLQ engineers can use these parameters to calculate the required induction heating power and recommend the appropriate electromagnetic induction steam generator, feedwater system, electrical configuration and steam-system solution.