SF6 gas recovery and filling device is an integrated recovery device, consisting of a vacuum pumping system, compression system, purification system, storage system, and condensation system. The SF6 gas recovery, purification, and filling device is used in manufacturing plants of SF6 gas insulated electrical equipment, as well as in operation, research, and other departments, to perform vacuum pumping on various electrical equipment, fill SF6 gas into electrical equipment, recover SF6 gas from electrical equipment in use or under test, and simultaneously purify and compress it for storage in storage tanks. The recovery device is suitable for SF6 electrical equipment of various voltage levels and GIS combined electrical appliances, etc.
Referring to the power industry standard DL/T 662-1999 "Technical Conditions for SF6 Gas Recovery Devices" and the former Ministry of Machinery and Electronics Industry standard JB/DQ2588-90 "SF6 Filling and Recovery Devices", and referencing the advantages of the world-renowned German brand DILO products, this SF6 gas recovery and filling device has been developed, making it more suitable for China's SF6 high-voltage switchgear industry.
Device Composition
The device consists of a recovery system, filling system, vacuum pumping system, drying system, purification system, and storage system.
Main Functions
● Vacuum pumping and vacuum measurement of the device itself, electrical equipment, and storage tanks
● Recovery of gas from electrical equipment
● Drying and purification of recovered and refilled SF6 gas
● Filling SF6 gas into SF6 electrical equipment
● Compression and liquid storage of SF6 gas from electrical equipment
Device Features
● Adopts the design principle of freezing liquefaction, which reduces the working pressure of the system and greatly improves the recovery efficiency.
● The refrigeration compressor can be optionally equipped with an original imported fully hermetic refrigeration compressor from France. It can also be upgraded free of charge to a semi-hermetic refrigeration compressor produced by a wholly US-owned enterprise, Emerson-Copeland (performance far exceeds any original imported fully hermetic compressor of the same cooling capacity).
● The SF6 compressor is a semi-hermetic compressor produced by a wholly US-owned enterprise (Emerson-Copeland brand), applied to halogen gases such as SF6, with fluorine resistance characteristics, ensuring no leakage.
● The vacuum pump can be optionally equipped with a Japanese Ulvac two-stage rotary vane vacuum pump or a German original Busch, German wholly-owned Leybold, etc.
● Dual-container system, SF6 can be liquefied and filled into cylinders, with a filling capacity of no less than 50kg. The single-container recovery device has a cylinder filling capacity of no less than 30kg.
● The dual-container system has an innovative SF6 vaporization method, using higher temperature and high-pressure SF6 gas to force low-temperature and low-pressure SF6 liquid into cylinders, with short time and large filling capacity.
● A column-type liquid level gauge can be used, providing intuitive and accurate SF6 liquid level indication. The liquid level has backlight indication, which is clear and distinct.
● The liquid storage container is built-in with a high-power SF6 vaporization electric heater. Temperature control is automatically performed during use to fully vaporize SF6 for external filling.
● Excellent imported (US) oil mist filtration system ensures oil content meets standards. Compressor lubricating oil ensures no need for addition within one year, and the oil level is guaranteed not to decrease.
● The molecular sieve drying system is reliable. Molecular sieve regeneration does not require disassembly, dismounting, or replacement, and is convenient to use. Only self-regeneration operation of the molecular sieve dryer is needed, and the drying performance can be restored to its original state.
● All ball valves adopt the working principle of American Swagelok, with sealing elements having automatic compensation performance. They are practically applied to vacuum and pressure conditions, ensuring no leakage in both vacuum and pressure, and are special ball valves for both vacuum and pressure use. (American Swagelok original ball valves can also be selected).
● Customized phase sequence protection device, with a withstand voltage of up to 500V, greatly improving reliability.
● Three-phase five-wire power supply, safer and more reliable.
● The flow chart can be optionally drawn on the panel for convenient and intuitive operation. All ball valves are used, with clear open and close states.
● Adopts air-cooled, mobile type, can be used without a water source.
● The vacuum gauge is a digital display Pirani vacuum gauge.
● High-quality casters for easy movement without damaging the floor.
