The green ammonia system is a zero-carbon production system that uses renewable energy (such as wind energy, solar energy, etc.) as the energy source, produces green hydrogen through water electrolysis, and synthesizes green ammonia with nitrogen from air separation. Its production process uses hydrogen and nitrogen as raw materials, replacing the traditional high-carbon emission process that relies on fossil fuels, and is one of the key pathways to achieve industrial decarbonization and energy transition. The green ammonia synthesis system integrates equipment such as water electrolysis for hydrogen production, multi-stage reactors, and energy circulation to achieve low energy consumption and efficient synthesis.
Order onlineThe green ammonia system is a zero-carbon production system that uses renewable energy (such as wind energy, solar energy, etc.) as the energy source, produces green hydrogen through water electrolysis, and synthesizes green ammonia with nitrogen from air separation. Its production process uses hydrogen and nitrogen as raw materials, replacing the traditional high-carbon emission process that relies on fossil fuels, and is one of the key pathways to achieve industrial decarbonization and energy transition. The green ammonia synthesis system integrates equipment such as water electrolysis for hydrogen production, multi-stage reactors, and energy circulation to achieve low energy consumption and efficient synthesis.
The System Comprises: Green Hydrogen Production System via Water Electrolysis, Nitrogen Production System via Air Separation, Green Ammonia Synthesis Reaction System, Gas Treatment and Separation System, and BOP System
1. Water Electrolysis System
Using water as raw material, it utilizes surplus, low-cost, and non-storable off-peak electricity, or electrical energy generated from renewable energy sources such as photovoltaics, wind power, and hydropower. Water undergoes catalytic electrolysis: water molecules undergo electrochemical reactions on the electrodes, with hydrogen gas produced at the cathode and oxygen gas at the anode. The gas generated in the electrolyzer enters a hydrogen-oxygen separation, washing, and scrubbing tank for gas-liquid separation, washing, and cooling, and then is sent to subsequent equipment for purification and drying. The produced hydrogen, after passing quality inspection, is used for energy conversion, storage, transportation, or reuse.
2. Nitrogen Production System via Air Separation
The cryogenic air separation nitrogen production system uses molecular sieves to adsorb oxygen, separating and purifying nitrogen from air, and directly outputs nitrogen (with a purity of 95-99.999%) with relatively low energy consumption.
3. Green Ammonia Synthesis Reaction System
● Multi-stage Reactor (Synthesis Tower)
Function: Realizes the synthesis of ammonia from nitrogen and hydrogen (N₂ + 3H₂ ⇌ 2NH₃) under the action of a catalyst.
Principle: It adopts a multi-bed design with three reaction beds. Inter-stage heat exchangers are used to control the temperature gradient (high temperature → low temperature), preventing catalyst deactivation.
Material Selection: Stainless steel or nickel-based alloys are used for ammonia corrosion resistance.
Technical Highlights: It adopts a triple-tube parallel flow design to optimize gas distribution and heat exchange efficiency, suitable for medium-low pressure (10-15 MPa) synthesis processes. Internal components include diamond-shaped distributors, inter-bed heat exchangers, etc.
Synthesis Tower
● Recycle Compressor
Function: Compresses the unreacted nitrogen-hydrogen mixture gas and re-feeds it into the reactor to improve raw material utilization.
Principle: A centrifugal compressor is adopted, which realizes pressure boosting through multi-stage impellers and is equipped with frequency conversion control to adapt to fluctuations in renewable energy supply.
2,000 Tonnes Per Annum Green Ammonia Equipment
4. Gas Treatment and Separation System
● Ammonia Separator
Function: Separates liquid ammonia from the synthesis gas, and returns the unreacted gas to the recycle compressor.
Principle:
Condensation system: Cools the gas to below -20°C to liquefy ammonia, and achieves efficient separation with the help of a gas-liquid separation tank.
Water absorption system: Utilizes the property of ammonia being highly soluble in water (subsequent distillation is required for ammonia recovery).
5. BOP System (Auxiliary and Control System):
● Dynamic Regulation System
Function: Adapts to fluctuations in renewable energy and enables flexible operation of the ammonia synthesis system.
Adoption of Multi-parameter Optimization Algorithm: Adjusts parameters such as electrolyzer power, compressor speed, and reactor temperature.
Features: Uses the Siemens PLC system to achieve real-time matching between green electricity-based hydrogen production and ammonia synthesis.
● Safety Monitoring Device
Function: Prevents ammonia leakage, explosions, and equipment corrosion.
