summary:
The monitoring, detection, and control of chemical components in the chemical production process play a crucial role in increasing the yield, reducing consumption, improving product quality, and ensuring safe production of chemical products.
The advantages of using industrial online process chromatography and laboratory chromatography for manual sampling, analysis, and report filling are self-evident. But in the field of chemical industry in China, industrial online process chromatography is almost dominated by products from foreign companies. Due to its high price, it is difficult to widely use it in the chemical industry in China.
With the continuous increase of labor costs in China and the impact of the special environment (toxic, polluting, and dangerous) of chemical enterprises, the use of industrial online process gas chromatography is an indispensable tool for chemical enterprises to improve the real-time analysis, avoid manual operation errors, improve analysis accuracy, reduce labor intensity, and enhance automation level.
On the basis of 6 years of dedicated research and development of chromatography technology, several major technical obstacles of industrial online process chromatography were overcome one by one, and successfully operated 24/7 non-stop in Xiasha, Shangyu, Chengdu, Taicang, Weifang and other places.
Instrument features:
★ Upright integrated cabinet structure, positive pressure explosion-proof box body, explosion-proof grade: ExPxd Ⅱ CT3, suitable for various explosion-proof places;
The box is made of stainless steel to cope with long-term use in environments with corrosive gases in the factory;
★ Two independently controllable chromatographic column boxes, capable of single machine operation or single sample analysis at different column box temperatures;
★ Support program temperature rise column box with rear door opening, which can achieve analysis of complex samples;
★ Supports gas path control for chromatography with full EPC technology. Realize remote operation of instrument control parameters;
★ Set temperature and pressure sensors inside the box to achieve gas flow correction of the EPC module;
★ Built in pressure detection, abnormal pressure alarm, and protection for 4 gas sources (carrier gas, hydrogen gas, air, power gas);
★ Supports packed column and capillary column injectors; Gas injection with 6-way valve, 10 way valve, 12 way valve, and liquid injection with 0.5ul, 1.0ul, and 1.5ul micro valves;
★ Supports multiple detector modules, including thermal conductivity detector (TCD), flame ionization detector (FID), flame photometric detector (FPD), and electron capture detector (ECD);
★ It has functions such as sample filtration, decompression, and extraction;
★ Built in fiber optic interface enables long-distance data transmission and control;
★ Equipped with NETChrom ® The workstation can support multiple chromatographs (253 units) working simultaneously, achieving data processing and reverse control, reaching a leading level in the industry;
★ NETChrom ® The Modbus/TCP server built into the workstation facilitates the integration of analysis results into DCS (Distributed Control System); The detection data can be included in the factory's automatic control system and comprehensive information management system;

Main technical indicators:
Temperature controlled area: 8 channels
Temperature control range: 4 ℃ to 450 ℃ above room temperature, increment: 1 ℃, accuracy: ± 0.01 ℃
● Program heating order: 16 orders
● Lift rate: 0.1-39 ℃/min (ordinary type); 0.1-80 ℃/min (high-speed type)
External events: 6 channels; Auxiliary control output 2 channels
● Sample injector types: packed column injection, capillary injection, six way valve gas injection, micro valve liquid injection optional
Number of detectors: 4 (maximum); FID, TCD, ECD, FPD, and NPD are optional
● Gas path control: EPC mode optional
EPC and EFC working modes: 2 types; Constant current mode, constant voltage mode
EPC and EFC working gases: 5 types; Nitrogen, hydrogen, air, helium, argon
EPC and EFC lift: 4th order
EPC and EFC control range: pressure: 0-0.6MPa; Flow rate of 0-100mL/min or 0-500mL/min (air);
EPC and EFC control accuracy: pressure 0.01KPa; Flow rate of 0.01 mL/min;
● Pressure sensor:
Accuracy:<± 2% of full scale
Reproducibility:< ±0.05 KPa
Temperature coefficient:< ±0.01 KPa/°C
Range: 0-0.6MPa;
● Flow sensor:
Accuracy:<± 5% of full scale
Reproducibility:<± 0.5% (full scale)
Range: 0-500 mL/min
● Start injection: manual or automatic selection
Communication interface: 1310nm-SC single-mode fiber, maximum transmission distance of 40km
● Whole machine cabinet structure: 840×1000×456mm
● Bracket installation structure: 840 × 450mm; Fixed bolt: 540 × 410mm;
● Environmental temperature:- 10 ～ 45 ℃
● Relative humidity:< 90%
● Protection level: IP50
Explosion proof level: Positive pressure inflation explosion-proof, explosion-proof level is Ex p Ⅱ CT3
● Instrument air: Instrument (air) air should be oil-free and dust-free at 0.4MPa to 0.6MPa. Consumption: Ventilation status: 10L/min ventilation status: 80L/min
● Power supply: 220VAC±10% 50HZ; 4KW (maximum)

Technical specifications of detector
Hydrogen flame ionization detector (FID):
Detection limit: Mt ≤ 3 × 10^-12G/s (n-hexadecane-isooctane solution);
Noise: ≤ 5×10^-14A
Drift: ≤ 1×10^-13A/30min
● Linear range: ≥ ten⁶

Thermal conductivity detector (TCD):
Sensitivity: S ≥ 3500mV • ml/mg (conventional) 5000mV • ml/mg (highly sensitive) (benzene toluene solution) (amplification 2, 4, 8 times optional)
Noise: ≤ 10μV
Baseline drift: ≤ 30μV/30min
● Linear range: ≥ ten⁴

Electron Capture Detector (ECD):
Detection limit: ≤ 1×10^-14g/s
Noise: ≤ 0.03mV
Baseline drift: ≤ 0.2mV/30min
● Linear range: ≥ ten³
● Radioactive source: 63Ni

Flame photometric detector (FPD):
Detection limit: (S) ≤ 5 × 10^-11g/s ,(P)≤1×10^-12g/s；
Noise: ≤ 0.03mV
Baseline drift: ≤ 0.2mV/30min
● Linear range: ≥ ten³（S）,10²（P）