Comprehensive protection system and method for automatic liquid level measuring device of asphalt reaction kettle

Abstract

The invention discloses a comprehensive protection system and method for an automatic liquid level measuring device of an asphalt reaction kettle, wherein the comprehensive protection system comprisesa heat conduction oil pipeline and a medium-temperature steam pipeline, and a jacket type gate valve and a jacket type sampling pipe in the liquid level measuring device are subjected to heat tracingthrough the two pipelines. The comprehensive protection system further comprises a jacket sampling pipe temperature instrument, a medium-temperature steam pipeline temperature instrument and a heat conduction oil pipeline temperature instrument; the jacket sampling pipe temperature instrument is arranged on the jacket type sampling pipe, the medium-temperature steam pipeline temperature instrument is arranged on the medium-temperature steam pipeline, and the heat conduction oil pipeline temperature instrument is arranged on the heat conduction oil pipeline; the comprehensive protection systemcomprises automatic control valves which are respectively arranged on the heat conduction oil pipeline and the medium-temperature steam pipeline. A heat source is selected nearby according to the type of a heat source in the asphalt process to perform heat tracing control on the jacket type gate valve and the jacket type sampling pipe in a sampling system; two heat sources are provided and can beautomatically switched according to the conditions of the heat sources, and continuous, stable and accurate measurement of liquid level measurement of a teletransmission flange liquid level transmitter can be guaranteed.

Description

Technical field[0001]The invention relates to the technical fields of tar processing technology and high-temperature asphalt chemical production technology, in particular to a comprehensive protection system and method for an automatic liquid level measuring device of an asphalt reactor.Background technique[0002]1) In technical fields such as tar processing technology and high-temperature asphalt chemical production technology, the medium-temperature asphalt with a softening point of 75°C to 90°C is sent to the asphalt reactor for further heating, and the intermediate-temperature asphalt further undergoes thermal polymerization and thermal condensation reaction to form higher Molecule aromatic hydrocarbon compounds, part of the low boiling point substances are steamed out, the softening point of the pitch is increased, and high temperature pitch is obtained. The temperature in the asphalt reactor is maintained between 350°C and 390°C, and in extreme cases it can reach above 400°C. T...

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Problems solved by technology

[0003] 1) When the ambient temperature changes or the temperature of the medium changes, the heat dissipation efficiency of the radiator changes, and it cannot be guaranteed that the temperature of the asphalt liquid level measurement sampling system is strictly controlled between 210°C and 310°C

[0004] 2) When the operation mode of the asphalt reactor is intermittent operation, there will be low temperature conditions. At this time, the temperature of the asphalt medium will be too low to solidify in the sampling pipe and the flange diaphragm of the measuring instrument, so that the instrument cannot be used when it is put into normal operation. normal work

[0005] 3) When the process is overhauled, the temperature of the asphalt reactor will drop, and the sampling system is easily blocked by the asphalt medium with poor fluidity, resulting in damage to the sampling valve and instrument

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