The selection of a gas analysis system in chemical processes is crucial for the smooth operation of chemical production. If the wrong system is chosen, it can affect production, cause instruments to malfunction, or increase maintenance workload. Many chemical companies have experienced unsatisfactory instrument performance due to choosing cheaper options or other factors during the selection process. Here are six key points on how to choose the right analyzer:
(1) Are the required parameters of the instrument and the process conditions applicable?
Analyzers generally need to operate under clean gas medium conditions. Therefore, the demander must provide detailed on-site parameters of the measured gas medium in the process (taking gas component analysis as an example), such as pressure, composition of the medium, gas temperature, gas humidity, dust content, crystallization situation, and presence of corrosive gases, etc. Once these data are obtained, the analyzer manufacturer will consider whether their developed, designed, and produced analyzer can match the on-site conditions and select the applicable analyzer to solve the problem. The above process parameters are all indispensable. Missing any one of them may cause errors in analysis or fail to express the intended use effect, thereby significantly increasing the workload. Therefore, when selecting, it is necessary to clearly understand the process parameters of the analyzer used at a certain monitoring point.
(2) The applicability and stability of the pre-treatment before the analyzer.
The pre-treatment unit of the gas analyzer is a very crucial component of the gas analysis system. Its importance may even exceed that of the analyzer itself. Why does the pre-treatment system have such an important role? Because the analyzer is a precision instrument. The operating environment is also a harsh chemical environment. Therefore, 95% of the failure rates in using the analyzer occur in the pre-treatment unit. Generally, the various pre-treatment components used in the processing unit must be highly reliable. Considering the process medium parameters, they must be higher than their processing capacity. This can ensure the good operation of the analyzer. Otherwise, it will greatly increase the spare parts cost or maintenance workload. Therefore, when choosing an analyzer, it is necessary to consider whether its pre-treatment unit has run under the same working conditions and its operating status. Even in mature pre-treatment, it should also be considered. This can ensure the proper use of the analyzer.
(3) The R&D, production, and after-sales capabilities of the instrument manufacturer
During the bidding process, instrument manufacturers are often invited to participate. Because in the process of using the instrument, who can guarantee that the instrument itself will not have problems? However, if there is a problem, the timely response and after-sales of the manufacturer are extremely important. If a unit of the middleman nature is chosen for cooperation, it often takes many layers of contact to find the relevant personnel responsible for the instrument after the instrument fails. However, cooperation with the manufacturer can greatly avoid the above situations. The after-sales may also be very timely, without affecting production and safety. Secondly, the technical content of the instrument itself. Generally, the analyzed instruments using the Xianjin technology are often developed to address the shortcomings or defects of previous similar products. Therefore, when selecting an analyzer, this issue must be given priority consideration. We are not afraid of encountering problems, but we are afraid of not being able to solve the problems well. Therefore, when selecting, it is necessary to choose a strong manufacturer and an agent company. This can ensure the timely availability of spare parts and after-sales, and the stability of the Xianjin performance of the product.
(4) Investigation of the usage of similar products in enterprises with the same production process.
If the same production process is relatively mature or widely used in the country, it is necessary to conduct more investigations. If the relevant production process is good in the country, it may be considered to communicate more with the manufacturers in the early stage. Jointly develop the scheme for the related analysis system and the emergency plan during the later usage process. Each manufacturer's analysis instrument system has its own characteristics. Some have successfully designed the pre-treatment unit, some have good sampling parts and analysis instrument parts, but no manufacturer dares to claim that all parts are good without any defects. Therefore, during the selection process, after preliminary understanding and recognition, first determine one to three analysis system manufacturers, and then conduct on-site field investigations at the relevant usage units. This way, the most genuine and accurate information can be obtained, and it is also helpful for the final selection.
(5) Try to choose domestic pre-treatment systems as much as possible.
Why do we say here that we choose domestic gas analysis pre-treatment systems? Firstly, the situations of each process are different, and the pre-treatment systems are customized, which is very targeted. They can be designed and produced according to the changes of the on-site medium, and the after-sales service and product defect updates will be timely. However, the pre-treatment systems of foreign countries are not like this. Because some practical and successful cases and mature products exist in foreign countries. In our country, there may also be situations where they do not adapt to the local conditions. After all, there is still a certain gap in the management and technical level of enterprises. Therefore, it is recommended to choose domestic pre-treatment systems when purchasing analysis instruments.
(6) If conditions permit, consider importing analysis instruments.
The performance of foreign analysis instruments is indeed at a higher level than domestic ones. Therefore, at relatively important sampling positions, it is possible to consider choosing imported analysis instruments. Although domestic analysis instruments are also mature in some aspects, there may still be some differences. If it is a general mature domestic analysis instrument, it can be directly selected, such as oxygen analyzers, dew point meters, infrared gas analyzers, thermal conductivity analyzers, etc.
After introducing so much, the ultimate goal is to tell everyone that when choosing gas analysis instruments, one must clearly understand the essence. It is not the more expensive the better, not every manufacturer of this type of instrument has the product quality, and not every instrument can run very well on-site after a simple selection. Even imported analysis instruments may have problems. Therefore, the specific situation should be addressed specifically, and choosing a gas analysis system suitable for the process conditions is of crucial importance. During use, strengthen learning and enhance understanding of the product to truly make the analysis instrument serve the process. Do not become a burden for the instrument maintenance personnel.
