Industry Applications
High‑Efficiency Refrigeration for Environmental Protection:Chiler in Oil‑Vapor Recovery Project of a Petrochemical Company in Shandong

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Project Background
Actively responding to the national environmental protection policies, a major petrochemical company in Shandong invested in the construction of a 3,000m³/h vapor recovery unit (VRU) aimed at reducing VOC emissions and achieving the dual goals of environmental compliance and resource recovery. In this project, low-temperature condensation serves as the critical process stage for vapor recovery, imposing stringent requirements on stability and efficiency of the refrigeration system.
Process Challenges and Requirements

  • Extreme process requirements: The vapor stream must be rapidly cooled from ambient temperature to below -75°C to achieve multi-stage deep condensation

  • Continuous and stable operation: The continuity of petrochemical production demands 24/7, year-round reliable operation of the refrigeration system

  • Energy efficiency and cost-effectiveness: Large-scale devices must minimize operational energy consumption and control production costs

Customized Solution

Our company has specially developed and designed eight ultra-low temperature chillers for this project


       

System Configuration     


       

  • Main system parameters              
    Unit type: Ultra-low temperature glycol chiller

  • Unit cooling capacity: 45kW (-45°C operating condition)

  • Water outlet temperature: -45°C to -80°C, adjustable

  • Data collection and recording requirements
    Collect inlet and outlet pressure, inlet and outlet temperature, and flow rate. Data acquisition: 1-second sampling frequency, 10-second data logging interval

  • Special anti-corrosion design
    Evaporator/condenser: 316L stainless steel

  • Pipeline system: epoxy resin coating + cathodic protection

  • Shell: anti-corrosion coating + stainless steel outer plate

  • Intelligent control system
    7-inch touch screen, LCD display, remote programmable temperature and flow control

  • Operational stability
    Over 8,000 hours of continuous operation without failure

  • Successfully withstood three power grid fluctuations

  • Safety records
    No safety-related downtime incidents

  • Received commendation from the customer’s safety management department

  • Economic and environmental benefits

  • Energy-saving effectiveness
    The heat recovery system preheats the process medium, achieving 8% energy savings

  • Overall energy savings of 25% compared to traditional solutions

  • Maintenance and management
    Equipped with a buzzer and an alarm light

  • Modular design reduces maintenance time by 50%

Customer Reviews
“This ultra-low temperature chiller is the core equipment of our 3,000m³ vapor recovery unit. Since its commissioning, it has not only fully met the process requirements of deep condensation at -45°C, but its excellent stability and energy efficiency have exceeded our expectations. Especially under extreme weather conditions such as summer heat and winter cold, the equipment has remained stable and reliable, making a significant contribution to our company’s  environmental compliance and economic benefit enhancement.”
Industry Demonstration Value
This project has successfully achieved:

  • Technological breakthrough: Industrial-scale application of domestically manufactured ultra-low temperature refrigeration equipment in the petrochemical industry

  • Economic benefits: Demonstrates that environmental protection investments can yield significant economic returns

  • Industry promotion: Provides a replicable technical solution for VOC abatement in the petrochemical industry

Conclusion

The successful collaboration with this major petrochemical company in Shandong marks a new milestone in our technical strength in the field of eco-friendly refrigeration. We have not only provided the customer with a stable, highly efficient ultra-low temperature refrigeration solution, but also have empowered the petrochemical industry toward green and sustainable development through technological innovation, contributing our professional expertise to national environmental protection efforts.

Professionalism fosters reliability, while innovation leads the future
Chiler Refrigeration Equipment Co., Ltd. specializes in high-precision constant-temperature and constant-flow chiller solutions and has amassed extensive project experience in fields such as petrochemicals, chemicals, new energy, semiconductors, and energy storage. We are committed to providing customers with safe, efficient, and reliable customized refrigeration systems.
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