Insulating-Gas Distillation Unit

The XINYU HUACHUANG Insulating-Gas Distillation Unit is an advanced, highly automated testing and purification system specifically engineered for the separation and recovery of high-voltage insulating gases. Designed to meet strict environmental and industrial standards, this unit accurately controls temperature, pressure, and flow dynamics to separate insulating gas mixtures (such as SF6/N2) and remove moisture, oil, and acidic impurities. Equipped with intelligent PLC automation, real-time gas analysis, and zero-emission tail gas collection, the Insulating-Gas Distillation Unit ensures safe, continuous operation while delivering ultra-high purity dielectric gases for electrical equipment maintenance and R&D.

What is an Insulating-Gas Distillation Unit?

An Insulating-Gas Distillation Unit is a specialized chemical separation apparatus designed to process and purify dielectric gases used in high-voltage electrical equipment, such as Gas-Insulated Lines (GIL) and Gas-Insulated Switchgear (GIS). It operates by utilizing low-temperature distillation and pressure-swing principles to separate mixed gases (e.g., recovering liquid SF6 from gaseous SF6/N2 mixtures) and purifying degraded gases from decommissioned equipment. The unit integrates multi-stage filtration, condensation, and distillation processes to achieve gas purities exceeding 99.9%, ensuring the recovered gas can be directly reused. This unit serves as an essential platform for power grid maintenance, environmental compliance, and dielectric material research.

Why This One?

● High-Purity Separation: Utilizes advanced low-temperature distillation and multi-stage purification to achieve insulating gas purity of over 99.9%, meeting strict IEC and IEEE standards for electrical equipment.

● Zero-Emission Design: Features a closed-loop tail gas collection and recycling system that captures exhaust from concentration measurement devices, ensuring zero discharge of potent greenhouse gases like SF6.

● Intelligent PLC Automation: Centralized control system enables unattended long-term operation, automated data logging, real-time gas composition monitoring, and historical curve generation.

● Robust & Safe Construction: Built with premium, corrosion-resistant metallurgy and multi-level safety interlocks (over-pressure, leak detection, automatic emergency shutoff) to safely handle high-pressure and toxic gas environments.

● Energy-Efficient Recovery: Optimized refrigeration and heating systems maximize the liquefaction and separation efficiency of mixed gases, significantly reducing overall operational energy consumption.

Technical Specifications

How to Choose Right?

● Define Your Gas Mixture: Clearly identify the type of insulating gas (e.g., pure SF6, 20% SF6/80% N2 mixture, or alternative fluorinated compounds). This determines the required distillation temperature, pressure, and column configuration for the Insulating-Gas Distillation Unit.

● Purity & Flow Requirements: Determine your target gas purity and required recovery flow rate. High-purity applications (>99.99%) may require additional polishing filters or specialized packing materials.

● Environmental Compliance: Ensure the unit includes a certified zero-emission tail gas treatment system if operating in regions with strict regulations on SF6 emissions.

● Automation & Analytics: If continuous monitoring is required, select a configuration with integrated online gas analyzers (e.g., GC, FTIR, or NDIR) for real-time purity verification and automated cut-point adjustment.

Quality Inspection Process

● Material Verification: Strict inspection of incoming stainless steel, valves, and certified explosion-proof electrical components to ensure they meet metallurgical standards and high-pressure safety tolerances.

● Precision Machining: CNC machining of high-pressure reactor bodies, distillation columns, and piping to guarantee perfect sealing surfaces and structural integrity under extreme temperatures and pressures.

● Hydrostatic & Vacuum Test: Every unit undergoes rigorous hydrostatic pressure testing and deep vacuum leak testing to verify structural safety and absolute leak-proof performance.

● System Calibration: Comprehensive calibration of the PLC control system, temperature/pressure sensors, mass flow controllers, and online gas analyzers to ensure accurate data display and reliable control.

● Final Functional Run: A complete dry-run and simulated gas test to verify smooth operation, uniform thermal distribution, proper functioning of safety interlocks, and zero-emission tail gas capture before packaging.

After-Sales Service & Support

At XINYU HUACHUANG, we are committed to providing comprehensive and reliable after-sales support to ensure the continuous and efficient operation of your equipment. Our dedicated service team is always ready to assist you.

Comprehensive Warranty Coverage

We proudly offer a two-year warranty for our equipment. During this period, we provide free maintenance and repair services for any quality-related issues, excluding those caused by improper operation, unauthorized modifications, or force majeure. For equipment beyond the two-year warranty period, we continue to offer lifelong maintenance services, charging only the cost of replacement parts and labor.

Rapid Response Mechanism

We offer 7×24 hours professional engineering telephone support. Upon receiving a fault notification, our technical team will respond within 24 hours and provide a viable solution. If on-site service is required, our professional engineers will arrive at your facility within one week. In special circumstances where the equipment cannot be repaired, we will unconditionally replace it with a new unit or provide a substitute unit during the two-year warranty period, or take necessary measures to restore normal operation.

Frequently Asked Questions (FAQ)

Q1: What types of insulating gases can this unit process and purify?

A: The unit is designed for dielectric gases used in high-voltage electrical equipment, particularly SF6 and SF6/N2 mixtures found in Gas-Insulated Lines (GIL) and Gas-Insulated Switchgear (GIS). It can recover liquid SF6 from mixed gases and purify degraded gases from decommissioned equipment.

Q2: How does the unit achieve gas purity exceeding 99.9%?

A: It integrates multi-stage filtration, condensation, and low-temperature distillation processes in a cascading sequence. The low-temperature distillation separates components based on their boiling point differences, while pressure-swing principles further concentrate the target gas. This multi-stage approach ensures recovered gas purity exceeds 99.9%, making it directly reusable in electrical equipment.

Q3: Why is low-temperature distillation used instead of conventional heating for gas purification?

A: Dielectric gases like SF6 have very low boiling points and are sensitive to thermal decomposition. Low-temperature distillation operates well below the thermal degradation threshold of these gases, preserving their dielectric properties while still achieving effective separation from nitrogen, moisture, and decomposition byproducts.

Q4: How does this unit support environmental compliance for power utilities?

A: SF6 is a potent greenhouse gas with a global warming potential thousands of times greater than CO2. By recovering and purifying SF6 from decommissioned or maintenance equipment instead of venting it, the unit helps power utilities meet increasingly strict environmental regulations on SF6 emissions.

Q5: Can the recovered gas be directly reused in high-voltage equipment?

A: Yes. Once the gas purity exceeds 99.9%, the recovered SF6 meets the specifications required for direct reuse in GIL and GIS equipment. This eliminates the cost of purchasing new SF6 while simultaneously reducing environmental liability.