In recent years, with further research on the safety production of air separation equipment, a new consensus has gradually been reached: strictly controlling the content of acetylene in liquid oxygen and preventing explosion accidents caused by the accumulation of trace acetylene cooling in air separation equipment are the guarantees for the safety production of air separation units. At present, domestic ethylene plants have established air separation safety monitoring systems. Some have adopted advanced gas chromatography (enrichment method) to detect trace acetylene in liquid oxygen, while others still use chemical colorimetry to detect these methods. These methods are not only complex and time-consuming, but also affect work efficiency and quality.

Explosive substances mainly include acetylene and other hydrocarbons, as well as lubricating oil and light fractions of lubricating oil brought into the tower with processing air. Among the hazardous substances in the appeal, acetylene is the main source of explosion. Therefore, it is necessary to strengthen laboratory analysis and regularly monitor the content of liquid nitrogen, acetylene in liquid air, hydrocarbons, and oil. Among them, special attention should be paid to the control of acetylene content.

To ensure the safe operation of air separation equipment, the warning values for acetylene and hydrocarbons control indicators in the main cold liquid oxygen of industrial air separation equipment are: acetylene<0.1ppm, total hydrocarbons<100ppm It is not difficult to see that a typical gas chromatograph cannot directly inject samples to determine<0.1ppm acetylene. We have modified the chromatograph to meet the requirements of the appeal analysis, achieving a single injection to complete the full analysis of components such as methane, ethane, ethylene, acetylene, propane, isobutane, etc.

The gas chromatograph and gas chromatography analysis method provided by Huipu Analysis can effectively and quickly detect acetylene content in liquid oxygen. This analysis method complies with national and industry standards for data safety and reliability, and is easy to operate. Detailed instrument configuration and gas chromatography analysis method for acetylene content in liquid oxygen. For chromatographic analysis methods, please log in to our company website for free query and download. Or call our company's technical department to inquire about free analysis methods and method development.

Instrument configuration:
1. GC-2010 gas chromatograph+FID detector+capillary column injection system
2. Large caliber PLOT capillary chromatography column: 50m × 0.53mm × 0.25um
3. BF-300E Hydrogen Generator
4. BF-2L air generator
5. Nitrogen gas cylinder
6. Chromatographic data processing
7. Computer printer

The analysis method of acetylene content in liquid oxygen by gas chromatography is suitable for users such as refineries, petrochemicals, quality inspection, and commercial inspection departments

Main business of the company:
1. Help you establish a chromatographic analysis room, complete transformation of chromatographic gas circuit, chromatographic analysis methods, and train chromatographic operators.
2. Help you establish a complete laboratory plan and complete instrument project.
3. Professional sales and maintenance of various imported and domestic gas chromatographs, high-performance liquid chromatographs, gas generators, and other analytical instruments. (Agilent series, Shimadzu series, Waters, Thermoelectric, etc.)
4. Provide free technical consulting services for various analytical instrument applications, maintenance, etc
5. Acquisition and sale of second-hand imported gas chromatographs, liquid chromatographs, and spectrometers
6. Long term/short-term leasing of various chromatography instruments allows you to significantly reduce costs.
7. Annual discounted supply of chromatography consumables such as chromatography column gasification pads.


Main performance and technical indicators of GC-2010 gas chromatograph
1、 Main performance characteristics:
1. Chinese large screen LCD display, rich and intuitive display content, convenient parameter setting.
2. Adopting a microcomputer automatic ignition device.
3. Stable and reliable digital zeroing is adopted to avoid baseline instability caused by potentiometer zeroing.
4. It has an eight level program heating function.
5. The intelligent rear door automatic cooling system with frequency conversion function has a fast cooling speed and achieves true near room temperature operation.
6. The column chamber adopts a unique tracking heating method; Avoiding contamination of the detector caused by rapid heating of the column chamber
7. The three gas path structure allows for the simultaneous installation of three chromatography columns, FID and TCD detectors, and facilitates the expansion of ECD FPD, NPD detectors, as well as external control equipment such as gas injectors and converters.
8. Equipped with two packed column vaporization chambers and an independent capillary dedicated system, it features high-performance capillary split/non split injectors and tail blowing systems, making it easy to install small-diameter capillary columns, large-diameter capillary columns, and various packed columns.
9. This machine can be easily expanded from a single FID amplifier to a dual FID amplifier, and the parameters of the two amplifiers can be controlled separately, truly achieving multi-purpose use of one machine.
10. It has power failure protection function and can automatically memorize set parameters. It has anti power mutation interference function and stopwatch timing function
11. Equipped with over temperature protection function, the power automatically shuts off and an alarm is triggered when the temperature exceeds the set upper limit. If the temperature of any circuit exceeds the set temperature, it will automatically stop heating; And there are Chinese prompts for the cause of the fault and alarm prompts
12. Equipped with gas cut-off/leakage protection and Chinese prompt function, it can maximize the protection of TCD tungsten wire and chromatographic column from damage.
13. Equipped with fault self diagnosis function, displaying Chinese fault causes and alarm prompts at any time
2、 Temperature control technical indicators:
Temperature control range: room temperature+5 ℃ -400 ℃ Temperature control objects: column box, detector, thermal conductivity cell, sampler
Temperature control accuracy: ± 0.1 ℃ within 200 ℃; ± 0.2 ℃ above 200 ℃
Program temperature rise: eighth order linear range rise
Cheng Sheng rate: 0.1-40 ℃/minute increments of 0.1 ℃
3、 Technical specifications of detector: