SF6 decomposition product gas chromatograph

SF6 gas has very stable chemical properties and good insulation properties, and is widely used in the power industry. SF6 gas is used for insulation and/or arc extinguishing in four types of electrical equipment; SF6 circuit breakers and GIS (referring to SF6 enclosed composite electrical equipment, internationally known as "Gas Insulated Switchgear"), SF6 load switchgear, SF6 insulated transmission pipelines, SF6 transformers, and SF6 insulated substations. 80% is used for high and medium voltage electrical equipment.
During operation in power equipment, electric arcs can cause sulfur hexafluoride to decompose into various other compounds such as hydrogen (H2), oxygen (O2), nitrogen (N2), carbon tetrafluoride (CF4), methane (CH4), carbon monoxide (CO), carbon dioxide (CO2), hexafluoroethane (C2F6), octafluoropropane (C3F8), sulfuryl fluoride (SO2F2), thionyl fluoride (SOF2), sulfur dioxide (SO2), hydrogen sulfide (H2S), carbonyl sulfide (COS), carbon disulfide (CS2), etc. These compounds have an impact on the normal operation of equipment and also have a certain degree of impact on the environment. Therefore, the detection of operating gas has become one of the important tasks for units using sulfur hexafluoride as insulation gas in power equipment.
Instructions:
The GC-6600 SF6 decomposition product gas chromatograph is equipped with a self-developed valve column integrated heating device, which can reduce the connection pipeline between valves and columns, reduce dead volume, increase sensitivity, and reduce blowing time.
The unique pressure sensing automatic sampling system has a higher degree of automation. Can simplify the injection operation process and reduce personnel errors in injection.
Reference standard:
GB/T 12022-2014 "Industrial Sulfur Hexafluoride"
GB/T 18867-2014 "Sulfur Hexafluoride Gas for Electronic Industry"
GB/T 28726-2012 "Gas Analysis - Helium Ionization Gas Chromatography Method"
GB/T 8905-2012 "Guidelines for Gas Management and Detection in SF6 Electrical Equipment"
GB/T 28537-2012 "Use and Handling of Sulfur Hexafluoride (SF6) in High Voltage Switchgear and Control Equipment"
DL/T 1205-2013 "Test Method for Decomposition Products of Sulfur Hexafluoride Electrical Equipment"
DL/T 1359-2014 "Analysis and Judgment Method for Fault Gas of Sulfur Hexafluoride Electrical Equipment"
DL/T 1366-2014 "Sulfur Hexafluoride Gas for Power Equipment Use"
DL/T 1032-2006 "Sampling Method for Sulfur Hexafluoride (SF6) Gas Used in Electrical Equipment"
Q/GDW 11157.87-2009 "SF6 Electrical Equipment Gas Sampling Operation Manual"
Q/GDW 1896-2013 "Guidelines for On site Application of SF6 Gas Decomposition Product Detection Technology"
Q/GDG 114002-2011 "Preventive Testing Regulations for Power Equipment"
IEC60376-2005
Specification of technical grade sulfur hexafluoride(SF6)for use in electrical equipment
——Technical specification for sulfur hexafluoride used in power equipment
IEC60480-2005
Guidelines for the checking and treatment of sulfur hexafluoride (SF6) taken from electrical equipment and specification for its re-use
——Guidelines for Inspection and Handling of Sulfur Hexafluoride (SF6) Removal from Electrical Equipment and its Reuse Specification

Instrument features:
1. Main functional features
★ 1.1 New networked control and transmission, achieving real-time monitoring and data collection by multiple people:
The 10/100M adaptive Ethernet communication interface with technology * is adopted, and the IP protocol stack is built in. The IP address of the instrument is set, so that the instrument can realize remote control of the chromatograph, spectrogram collection and data transmission through the enterprise's internal LAN and Internet. Three independent connection processes are designed inside the instrument, which can be connected to the local processing (laboratory technician), unit supervisor (team leader), and superior supervisor (special duty, chief engineer, etc.) through the Internet, which can facilitate multiple people to monitor the operation of the instrument and analyze data results in real time, and improve work collaboration and timeliness.
★ 1.2 Networked chromatography workstation, which enables one computer to simultaneously monitor N gas chromatographs
The GC-6600-F instrument is equipped with a NETChromTM workstation, which can support multiple chromatographs to simultaneously process and control data, reaching the industry's highest level, effectively solving the problem of too many laboratory computers and freeing up experimental space. The analysis parameters of the sulfur hexafluoride analyzer, including carrier gas pressure, sample pressure, temperature, etc., are set or displayed through a workstation, which is easy to operate and provides real-time monitoring of the analysis conditions.
★ 1.3 High sensitivity helium ionization detector (PDHID)
The system needs to be equipped with two helium ionization detectors (PDIHID), for H2、O2、N2、CH4、CF4、CO、CO2、C2F6、C3F8、SO2F2、SOF2、SO2、H2S、COS、CS2 All 15 decomposition products have high linear response, and all decomposition product detection indicators can be detected at the ppb level.
★ 1.4 Adopting central cutting technology to achieve high automation of the instrument:
Using 5 VALCO automatic drive valves and 6 chromatographic columns for central cutting and blowback technology, the injection, switching, column selection, and reflux processes are automatically controlled through the time program set by the workstation. A single injection can complete the separation, selection, and detection of complex samples.
★ 1.5 Digital electronic zeroing technology enhances the anti-interference ability of instruments:
The detector signal zeroing adopts electronic zeroing technology, using high-precision digital circuits for base current compensation to achieve electronic adjustment of output signal level, reducing parasitic parameters and thus having strong anti-interference ability.
1.6 Automatic gas cut-off protection function to ensure the safe operation of the detector
Equipped with intelligent gas cut-off protection function, when the carrier gas pressure is below the safety threshold, the system will automatically cut off the detector voltage and the chromatograph will automatically cool down to protect the detector and chromatographic column from damage.
★ 1.7 Multi column Box System
The system is equipped with four independent column box temperature control units, using one main column box and three auxiliary column boxes to independently control the temperature of six chromatographic columns. Separate samples and activate different chromatography columns separately in different column boxes to avoid the problem of disassembling and assembling chromatography columns during detection and maintenance work.
★ 1.8 Industrial 5.7-inch color screen, Chinese LCD display
The display window adopts a 5.7-inch industrial color LCD screen design, which displays more comprehensive information, the interface operation is more reasonable, the display is intuitive, and the operation is convenient; Abandoning the fragile and low-end PVC leather buttons, plastic mold buttons are used, which have a good hand feel and are durable.
★ 1.9 standard gas
The instrument quantification adopts the mixed standard sample external standard method, and the mixed standard gas should consist of at least the following components in a set of two bottles. The range of standard gas components should be controlled between 1-100ppm:
Hydrogen (H2), oxygen (O2), nitrogen (N2), methane (CH4), carbon tetrafluoride (CF4), carbon monoxide (CO), carbon dioxide (CO2), hexafluoroethane (C2F6), octafluoropropane (C3F8), sulfuryl fluoride (SO2F2), thionyl fluoride (SOF2), sulfur dioxide (SO2), hydrogen sulfide (H2S), carbonyl sulfide (COS), carbon disulfide (CS2)
2. Technical indicators
2.1 Technical Performance:
Analysis cycle:<20min
Maximum error:<3%
Stable time:<30 minutes
Working environment: -10~50 ℃
★ 2.2 Helium Ionization Detector (PDIHID):
Discharge mode: Pulse discharge
Baseline noise: ≤ 0.1mv
Baseline drift: ≤ 0.5mv/30min
Detection limit: ≤ 1.0 × 10-10g/ml
2.3. Carrier gas purifier:
Purified gases: He, Ar, Ne, Kr, Xe, Rn
Maximum operating pressure: 1000Psi
Removing gases: H2, O2, N2, CO, CO2, CH4, H2O, NO, NH3, CF4, etc
Residual concentration: ≤ 10pppb
★ 2.4 Temperature control indicators:
Temperature control range: 4 ℃ -450 ℃ at room temperature
Temperature control accuracy: ± 0.01 ℃
Temperature controlled area: 8 channels
Program heating order: 8 orders
Program heating rate: 0.1 ℃ -80 ℃
Cooling rate: within 7 minutes (400 ℃ -50 ℃)
Detector: 4 ℃ -450 ℃ at room temperature with an accuracy of ± 0.1 ℃
2.5. Other parameters: size, weight, power supply
Dimensions: Width 572mm, Height 465mm, Depth 552mm
Weight:~50kg
Power supply: 220V ± 22V, 50Hz Power: ≥ 2kW
2.6 Communication Interface
Ethernet: IEEE802.3

3. New networked chromatography workstation:
We promise to provide more value for every step of the scientific data lifecycle, from data collection and analysis to interpretation and management.
1. Laboratory management function
Supervisors and managers can manage chromatographic state machine data in real-time through the network, and can set up a computer as a server to centrally store all data for data management to prevent the loss of raw data.
2. Networking
The connection port is a LAN interface, eliminating the drawbacks of RS232 data interface being prone to crashes and short distance. The high-speed transmission of data through Ethernet cables can enable one computer to control up to 253 chromatography instruments.
3. Total reversal control
All parameters related to analysis can be set on the workstation to achieve * reverse control.
4. Intelligent Points
All integration events and standard curve files are saved in the method file, which only needs to be set once. Irregular peaks will also be fully automatically integrated, saving the trouble of manual integration and eliminating manual integration errors.
5. Easy to operate
The software interface adopts tab page display, and parameter operation and display are clear at a glance, making it convenient for users to operate.
6. The temperature control area can be named
The temperature control area can be named according to user habits to prevent confusion. At the same time, whether the temperature control zone is heated can also be set.