About Leojoin
Established in 2007, Shandong Leojoin Environmental Protection Technology Group Co., Ltd. is a national high-tech enterprise integrating the R&D, design, production, sales, installation, commissioning, operation and maintenance services, and general contracting of engineering construction of seawater desalination equipment, industrial high-purity water equipment and water pollution control equipment.
We have two major production bases in Jinan (Shandong) and Fuzhou (Jiangxi), with a total floor area of 40,000 square meters. Leojoin has served more than 1,000 customers in 26 countries worldwide and all provinces in China.
Our products have fully passed the Hygiene Approval for Water-related Products, ISO9001-2015 Quality Management System, ISO14000 Environmental Management System, and EU CE Certification. We have been rated as a Contract-abiding and Trustworthy Unit for 10 consecutive years, adhering to the commitment of Uphold Responsibility for Every Trust.
R&D Background
Faced with the increasingly severe water resource challenges, the utilization of seawater desalination, high-salt wastewater, brackish water has become an important direction of industrial development. However, the core energy-saving equipment — the positive displacement isobaric energy recovery device, due to its extremely high technical barriers, has long relied on imports, becoming a “bottleneck” technology in China.
The import dependence has brought high procurement costs, restricted key technologies, slow service response, and fragile supply chain security, seriously restricting the economic benefits of domestic related projects.
Leojoin is driven by technological innovation. After years of painstaking research, we have successfully developed a positive displacement isobaric energy recovery device with complete independent intellectual property rights, breaking the dependence on imports, promoting cost reduction and efficiency increase in the industry.
Product Overview
Leojoin’s Positive Displacement Isobaric Energy Recovery Device is R&D and manufactured under the framework of ISO9001, ISO14001 and ISO45001 international standards.
The device transfers the pressure energy in the high-pressure concentrated waste liquid stream of RO to the low-pressure feed water stream through direct contact of liquid piston. It features a highly streamlined structure, with the rotor being the only moving part inside the device.
In the seawater desalination system, equipped with this device can reduce the capacity of high-pressure pump by 60% and the maximum system energy consumption by up to 60%, which is the core energy-saving equipment for seawater reverse osmosis (SWRO) process.
Product Parameters & Models
Basic Operating Limits
| Product Parameters | Operating Limits | Product Parameters | Operating Limits |
|---|---|---|---|
| Liquid Type | Seawater, high-salt wastewater, brackish water, etc. | Water Supply Temperature Range | 1-49℃ |
| Max High-pressure Inlet Pressure | 82.7bar (8.27Mpa), 1200psi | pH Value | 1-12 |
| Max Low-pressure Inlet Pressure | 10 bar (1Mpa), 145 psi | Flow Range | 9-59 m³/h |
| Min Back Pressure | 0.8bar (0.08Mpa) | Liquid Filtration Precision | 20μm |
Core Product Models & Performance
| Product Model | Rated Efficiency (EU/US Standard) | Flow Range (m³/h) | Percolation Flow (m³/h) | Max Working Pressure | EU/US Standard Mixing Degree |
|---|---|---|---|---|---|
| AL41-59 | 96.8% | 40.9-59 | 39.4 | 82.7bar(8.27MPa) | <3% |
| AL32-49 | 96.8% | 31.8-49.9 | 33.3 | 82.7bar(8.27MPa) | <3% |
| AL23-40 | 96.7% | 22.7-40.9 | 27.3 | 82.7bar(8.27MPa) | <3% |
| AL9-16 | 95.3% | 9.1-15.9 | 10.6 | 82.7bar(8.27MPa) | <3% |
Product Features & Advantages
World-leading Performance
Complies with GB/T30299-2013 national standard, EU/US standard efficiency up to 96.8%.
Innovative Structural Design
Only one moving part + ceramic rotor, reducing cavitation failures by more than 60%.
Extreme Energy Saving
Reduce system energy consumption by up to 60%, lower water supply costs significantly.
Low Maintenance Cost
Components maintenance costs reduced by more than 70%, no supply interruption risk.
Localized Efficient Service
Timely response, covering the whole life cycle after-sales service of equipment.
High Compatibility
Adapt to multiple liquids, supporting over 70% of global RO seawater desalination projects.
Project Applications & Core Value
Municipal Water Supply
Application: Million-ton seawater desalination plants, municipal drinking water supply for islands and coastal cities.
Core Value: Reduce energy consumption by 30%-60%, lower water supply costs.
Industrial Process Water
Application: Cooling/boiler feedwater for power industry; process water for petrochemical/chemical industry; ultrapure water for electronics.
Core Value: Continuous stable supply, reduce operational costs throughout life cycle.
Ship & Offshore Platform
Application: Freshwater self-sufficiency systems for ocean-going ships; drinking/cooling water for offshore oil and gas platforms.
Core Value: Compact design saves 40% space, low-energy consumption extends vessel endurance.
Military & Emergency Relief
Application: Independent water supply for military bases; mobile containerized RO desalination units for post-disaster deployment.
Core Value: Rapid deployment, compatible with Zero Liquid Discharge (ZLD) technology.
Zero-Carbon Water Supply System
Application: Integrated photovoltaic, wind and storage seawater desalination system for zero-carbon islands/communities.
Core Value: Mitigate energy fluctuations, contribute to carbon neutrality objectives.
Service Support
We establish a comprehensive after-sales service system covering the entire lifecycle of your devices, ensuring continuous and reliable operation, maximizing your return on investment.
Our core services: 24/7 technical consultation, rapid on-site maintenance, lifelong supply of spare parts, regular equipment inspection and maintenance, system upgrade optimization.
We have built an exclusive customer training platform with online-offline training, covering operational standards, fault prediction, emergency response, empowering your self-service maintenance capabilities.
Contact Us
Shandong Leojoin Environmental Protection Technology Group Co., Ltd.
📍 Address: Building 1, Evergrande Fortune Center, Huaiyin District, Jinan City, Shandong Province, China
📧 E-mail: [email protected]
📞 Hotline: +86 400-013-0003