ALK alkaline water electrolysis hydrogen production equipment

ALK electrolyzer gas liquid separation unit for hydrogen purification

ALK electrolysis hydrogen generator control panel and PLC system

Alkaline water electrolysis equipment installed at hydrogen production site

Containerized ALK hydrogen production system with electrolysis unit

Alkaline Water Electrolysis Hydrogen Production System

Production line of PFC magnetic ring automatic peeling, tin soldering, glue dispensing, and testingAlkaline Water Electrolysis (ALK) technology uses KOH aqueous solution as electrolyte, efficiently decomposing water into high-purity hydrogen and oxygen under direct current. It is one of the most mature and widely deployed green hydrogen production methods in industrial applications today.

This product series covers three installation configurations to meet different site requirements:
• Split-Installation Type (HY-HS Series): Electrolyzer, gas-liquid processing unit, and control system independently arranged; suitable for large fixed hydrogen stations with output range 20–2,000 Nm³/h.
• Containerized Type (HY-HC Series): Full system integrated in a standard 40-foot container, plug-and-play, supporting rapid mobile deployment; up to 100 Nm³/h per unit.
• Integrated Type (HY-HI Series): Electrolyzer, gas-liquid separator, and drying device integrated on a single base; compact structure for small-to-medium distributed hydrogen supply; output 5–10 Nm³/h.

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Product & Technical Features

All three configurations share the same core electrolysis technology and process route. Key technical features are as follows:

Bipolar Filter-Press Electrolyzer
- The electrolyzer adopts advanced bipolar filter-press structure with high-reliability insulating sealing gaskets, ensuring excellent sealing and long-term stability under high differential pressure. Optimized electrode plate and diaphragm materials significantly improve current density and efficiency while reducing overall size and weight.
Modular Gas-Liquid Processing Unit
- The gas-liquid processing unit employs a modular frame-combined structure with a clean and clear process layout, facilitating on-site installation, routine operation, and maintenance, effectively reducing operating costs and downtime.
Silicon Rectifier Power Supply
- The rectifier power supply uses silicon rectification technology, significantly reducing harmonic interference to the grid, decreasing reactive power losses, and improving overall energy efficiency in compliance with grid connection standards.
Fully Automatic Microcomputer Control System
- Equipped with an automated microcomputer intelligent monitoring platform, the control system supports local touch-screen operation and remote centralized management, with user-friendly HMI, multi-level access control, and data traceability. The integrated type can seamlessly connect to the user's existing DCS system for unattended operation.
Triple-Tower PSA Purification System (Containerized)
- The containerized type integrates a triple-tower PSA purification unit, capable of purifying crude hydrogen to ≥99.999% purity with dew point down to -70°C, meeting electronic-grade and semiconductor-grade ultra-high-purity hydrogen requirements.

Core Advantages

Wide Output Range

Full range 5–2,000 Nm³/h, flexibly configurable for projects of any scale
Grid-Friendly Low Harmonics

Silicon rectification eliminates harmonic interference and reactive power losses, compliant with grid connection standards
High-Purity Product Gas

H₂ purity ≥99.8% pre-purification; ≥99.999% after PSA purification; O₂ ≥99.2%
Plug-and-Play Rapid Deployment

Pre-assembled and tested at factory; connect water/electricity/gas on site to start production immediately
Low DC Power Consumption

DC power consumption ≤4.5 kW·h/Nm³H₂, with excellent energy utilization efficiency
Modular Easy Expansion

Modular design supports parallel multi-unit operation for phased capacity expansion with lower initial investment
Flexible Operating Load

Supports 50%–100% (split/containerized) or 40%–100% (integrated) wide-range load adjustment for variable conditions
Polished Stainless Steel Finish

Higher current density, faster start, wider load range (0–150% vs 30–100%), higher purity, no alkali hazard, no asbestos diaphragm, longer membrane life — overall lifecycle cost advantage.

Product Specifications

Split-Installation HY-HS Series
Containerized HY-HC Series
Integrated HY-HI Series

Model	Hydrogen production capacity (Nm³/h)	Oxygen production capacity (Nm³/h)	H₂ Purity Pre-Purif.	H₂ Purity Post-Purif.	Load Range	(MPa) Pressure	(°C) Temp.	Direct current consumption (kW·h/Nm³H₂)
HY-HS-20	20	10	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-60	60	30	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-100	100	50	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-300	300	150	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-500	500	250	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-1000	1000	500	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-1500	1500	750	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.5
HY-HS-2000	2000	1000	≥99.8%	≥99.999%	50%~100%	1.5~2.5	95±5	≤4.3

Parameter	Value	Unit	Notes
Container Spec.	Std. ISO 40HC	-	12192×2438×3200 mm
Rated H₂ Output	≤100	Nm³/h	Supports parallel expansion
H₂ Purity Post-Purif.	≥99.999	%	Triple-tower PSA purification
H₂ Dew Point	≤-70	°C (atm)	-
O₂ Purity	≥99.2	%	-
Operating Pressure	1.5~2.5	MPa	-
Operating Temp.	85~95	°C	-
DC Power Consumption	≤4.5	kW·h/Nm³H₂	-
Load Range	50~100	%	-
Electrolyte Conc.	30% KOH	-	-
Cooling Method	Water Cooling	-	-
Control System	PLC Auto + Touch Panel	-	Remote comm. interface

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Model	Hydrogen production capacity (Nm³/h)	Oxygen production capacity (Nm³/h)	H₂ Purity	O₂ Purity	(°C) H₂ Dew Point	Load Range	(MPa)	(°C) Temp.	Cooling
HY-HI-5	5	2.5	≥99.8%	≥99.2%	-60	40%~100%	1.0~1.6	85±5	Air/Water
HY-HI-10	10	5.0	≥99.8%	≥99.2%	-60	40%~100%	1.0~1.6	85±5	Air/Water

Working Principle

Alkaline water electrolysis uses approximately 30% KOH aqueous solution as the electrolyte, decomposing water into hydrogen and oxygen under direct current. The core electrochemical reactions are:

Cathode (reduction): 2H₂O + 2e⁻ → H₂↑ + 2OH⁻

Anode (oxidation): 4OH⁻ → O₂↑ + 2H₂O + 4e⁻

Overall: 2H₂O → 2H₂↑ + O₂↑

Inside the electrolyzer, direct current drives the electrochemical reaction through electrode plates: hydrogen is generated at the cathode and oxygen at the anode. Generated gases carry electrolyte into the gas-liquid separator for primary separation. The separated gas then undergoes cooling, alkali washing, and drying to obtain product hydrogen and by-product oxygen meeting purity requirements.

The complete system process flow

Electrolytic Hydrogen Production → Gas-Liquid Separation → Gas Cooling → Alkali Washing → Drying (incl. PSA purification for applicable models) → Product Output.

Each process stage is carefully optimized to ensure long-term stable, efficient, and safe operation.

Key Application Scenarios

Alkaline water electrolysis hydrogen production equipment is suitable for a wide range of industrial and energy applications, including:

Large-Scale Renewable Energy Coupled Hydrogen Production

Paired with wind and solar power for large-scale green hydrogen production, serving chemical feedstock and metallurgical reducing agent applications.
Petroleum & Chemical Hydrorefining

Providing stable hydrogen supply for refinery hydrodesulfurization, hydrocracking, and ammonia synthesis processes.
Ultra-Pure Hydrogen for Electronics/ Semiconductors

Providing ultra-pure hydrogen for chip manufacturing, photovoltaic cell production, and LED manufacturing protective or reducing atmospheres.
Power Grid Peak Shaving & Energy Storage

Using off-peak surplus electricity for hydrogen production and storage, releasing during peak periods for fuel cell power generation or industrial use.
Metallurgical High-Temperature Reduction

Providing high-quality reducing hydrogen for steel smelting and non-ferrous metal refining, supporting low-carbon metallurgical transformation.
Float Glass Production Lines

Providing H₂/N₂ mixed protective atmosphere for float glass tin baths, ensuring glass surface quality.
Mobile Hydrogen Stations / Temporary Supply

Containerized units suitable for rapid deployment of mobile hydrogen refueling stations for logistics vehicles and construction machinery.
Distributed Small-Scale Supply / R&D

Integrated units suitable for laboratories, pharmaceuticals, food processing, and electronic manufacturing distributed hydrogen supply.