Instruments and Chemical Analysis
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1.jpg I have spent 6 months thinking about this issue on my own. I’m sharing this today to discuss it with everyone. In the field of instrumentation, we often talk about five key parameters. What are these five parameters? On our Haichuan platform, in the instrumentation version, discussions have always focused on the first four parameters. Chemical analysis has also been given its own section, which falls under the industry category. Whether it is more effective at solving problems ； More immediate answers to questions ； Enable Haiyou to gain a broader understanding of instrumentation knowledge ； To enable field instrument technicians to have better access to and address issues ； From the perspective of an individual’s technical development... whether it is compositional analysis theory or one’s role within a company, chemical analysis is closely linked to production and instrumentation. Should we consider combining instrumentation and chemical analysis into one section? @zhangqi1234 @yuchenchf @zqwqiwu123 @qugd @2887848 @Guan Gongyu @Fish in the Desert @Thankful for You @Desert Poplars @Annie’s Baby
Yes, our instrumentation team is responsible for control valves, level gauges, and sampling boxes; there is a separate team for online analysis. Instruments are closely related to process operations. .
There is a reason behind splitting and integrating sections; if you don’t understand instruments, just let others make the decisions!
Comparison of differences between analytical instruments and chemical analysis
In terms of chemical analysis, it constitutes an independent department in petrochemical plants: the laboratory analysis room. This department is more closely related to the process engineering field; as for the analytical instruments installed directly on pipelines, they fall under the scope of the instrumentation field ； In the case of more complex pipeline sampling and analysis booths, the instrumentation team is involved in some of the maintenance work, while the key equipment remains related to laboratory analysis. Overall, given its characteristics, chemical analysis is better off as a separate section.
It’s not very good to combine them together. Chemical analysis involves many process technical parameters and product quality parameters, covering disciplines such as physical chemistry, thermal analysis, principles of chemical engineering, process control, and analytical chemistry, with an emphasis on chemical processing processes ； Instrumentation, on the other hand, mainly focuses on fields such as industrial instruments, industrial automation control, industrial electricity, and industrial electronics, with an emphasis on electrical automation. The concepts and knowledge of the two overlap, but they are mostly different, so it is not appropriate to combine them.
This post was last edited by qugd on 2016-2-17 at 13:17. In chemical enterprises, chemical analysis actually encompasses three aspects: 1. Routine process analysis in the laboratory. This type of analysis is part of daily work; samples are taken and analyzed at fixed or prescribed intervals based on the operating conditions of the process； 2. The quality monitoring of materials and products used in manufacturing involves analyzing them according to specific procedures based on the quality requirements for raw materials and finished products; the analysis data may include quality inspections of raw materials upon arrival at the factory and of finished products before they leave the factory. Such analyses usually involve keeping samples on hand for retesting in case the data is disputed. 3. Online analysis or process analysis refers to analysis that is carried out in real time (or at short time intervals). Depending on the process conditions and operational requirements, it provides timely reference data for the proper and safe operation of the process; it also generates data useful for quality control as well as for batch analysis of certain operations. From the perspective of the physical state of the object or medium to be analyzed and tested, analysis can be divided into that of gases, fluids, solids, or powders. In the case of gas analysis, it may be necessary to distinguish between water vapor and the vapors of other substances. As for fluid analysis, water accounts for a large proportion, especially in the analysis of water and steam in utility systems. Additionally, in terms of analysis indicators, there is analysis of the physical properties or states of single materials and mixtures, such as density and viscosity ； There is also compositional analysis of mixed materials ； As for certain special properties, such as electrochemical properties and the changes in the properties of materials during chemical reactions, these are concepts that are more distinct from temperature, pressure, flow rate, and level; examples include conductivity, pH, and changes in spectral characteristics of molecular structure (reformation, polymerization, synthesis, oxidation, isomerization, etc.). Considering the complexity of the sample, analysis can be carried out directly, or through bypass or container sampling; in some cases, sampling is done first, followed by preprocessing and analysis, after which the analyzed sample is collected and sent back, thus potentially forming an independent analysis system. The chemical analysis methods mentioned above each have their own characteristics, and they impose specific performance and application requirements on the analytical instruments and methods used; in addition, it may be necessary to determine whether the referenced methods meet relevant standards. The instruments mentioned in our field of study, especially those used in continuous manufacturing and production processes, generally refer to devices for measuring parameters such as temperature, pressure, flow rate, liquid level, or material level on-site. Analytical instruments, on the other hand, fall under the category of chemical analysis; their principles, structures, types, and applications are more complex compared to conventional on-site instruments, and they also involve related processes such as sampling, sample processing, and the collection or disposal of samples.