Abstract
Due to the continuity and complexity of chemical systems, piping and operating conditions will have a significant effect on the on-line continuous weighing of materials inside process equipment. In this paper, a mathematical model of the weighing system considering piping and operating conditions was established based on the gas–liquid continuous heat transfer weighing process. A theoretical criterion which can be extended to any continuous weighing system of the materials inside equipment with connected piping is obtained through the mechanical derivation between the material mass, the cantilever beam deflection, the strain gage deformation, and the bridge output voltage. This criterion can effectively predict the influence of piping on weighing results with specific accuracy, and provide a basis for engineering optimization design. On this basis, a set of gas–liquid continuous contact weighing devices was built. The static/dynamic experimental results showed that the accuracy of the system meets the set requirements.
Highlights
In chemical industry production, chemical reactions, heating, cooling, mixing, or other processes often take place in process equipment and, it must be possible to precisely measure the mass of internal materials
The results of this paper will provide a reference for the piping design of an on-line continuous materials weighing system, which is useful for the application of weighing technology in chemical processes
From Equations (13) and (15), it can be seen that the mathematical model of the material weighing system inside process equipment contains two parts: one is a linear term composed of mass truth value, system inherent parameters, and the additional mass mD ; the other is a power function term, which represents the measurement value variable caused by the connected piping
Summary
Chemical reactions, heating, cooling, mixing, or other processes often take place in process equipment and, it must be possible to precisely measure the mass of internal materials. In the reaction process with phase change, high pressure will lead to the Bourdon tube effect [22], so it is necessary to fill the soft joint with flexible materials to improve its bearing capacity, but the operation is difficult. Another commonly used method to reduce the piping force is to extend the horizontal pipe section as far as possible in situations where rigid connections must be used (for example, the medium is highly toxic and highly corrosive). The results of this paper will provide a reference for the piping design of an on-line continuous materials weighing system, which is useful for the application of weighing technology in chemical processes
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
