| Detection technology is accurate or not is decide priority among priorities can safe operation of chemical plant. Turpan-Hami Oilfield Company natural gas chemical plant oil and maleic anhydride device is butane-the only a set of working solvent absorption method maleic anhydride device. The solvent absorption system of Italy CONSER company to introduce technology for2007, the technique of detection without reference object in the home, need analysis in the production practice. Fault detection technology based on compliance with the conditions of technology and equipment of solvent system anhydride device exclusion, ensure the detection values are accurate, resulting in low fault detection technology and economic losses, which provides guarantee for safe production.In this paper, combined with the characteristics of technology and equipment system, the combination of major, statistical analysis, field test study on the measures to determine the common faults and causes, troubleshooting process, equipment, installation, environment and design defects. Analysis and test for common fault detection system on-site detection instruments, remote detection instrument, actuator and DCS control system was carried out in the production practice. Analysis of test objects including pressure gauge, magnetic level gauge, pressure transmitter, vortex flowmeter, mass flowmeter, rotor flowmeter, bimetal thermometer, thermocouple, thermal resistance, temperature change, the integration of radar level gauge, dual flange differential pressure level meter, Henghe DCS3000control system, pneumatic control valve, electric control valve instrument.Investigation and understanding of the basic situation of technology of maleic anhydride device solvent system and heat exchangers, towers, vessels, pumps and other equipment. Summarize the common fault phenomena of field, maleic anhydride device solvent system, control and execution of remote detection system, analyzes the causes of common faults, on the existence of the selection, installation, equipment, technology limitations and so on, summarizes the field type, solvent system, remote, control system and actuator detection system instrument troubleshooting analysis and troubleshooting of solvent system detection system. Through field application, the results of the inspection, to solve the problem of the main faults, to ensure the safety and reliability of detection accuracy and operation of numerical.Study on the difficulty lies in the detection technology of this kind of device can not be the reference object. The process medium is high temperature, pressure, density, viscosity, not pure and has the features of easy of crystalline solids, are important factors of interference of instrument detection. And the system design is compact, the towers, heat exchangers, pumps, centrifuges and tank containers, equipment installation intensive and vibration testing instrument installation position, subject to certain limitations. The key point is the instrument detection and professional process combination, achieve accurate detection.Research results include:Troubleshooting fault detection technology of the1eligible studies technology and equipment of solvent system anhydride device, provide accurate parameters for production operation, to provide guarantee for the safe and smooth production of detection.2to fill the domestic butane-solvent absorption detection technology of solvent system in maleic anhydride device blank.3modified the design defects.4in addition to detection instrumentation, combined with the technology side of the accuracy of the test data, change the past, a professional research limitations.5determine the reactor temperature measurement and molten salt pump liquid level measurement of the optimum setting mode. |
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