High-temperature oil pump flushing oil and instrument isolation liquid supply system and working method thereof

Abstract

The invention relates to a high-temperature oil pump flushing oil and instrument isolation liquid supply system and a working method thereof. The high-temperature oil pump flushing oil and instrumentisolation liquid supply system comprises a flushing oil main loop, a flushing oil user branch and an isolation liquid user branch, wherein the flushing oil main loop is composed of a flushing oil mainpipe, a flushing oil groove, a flushing oil pump, a pressure regulating valve, a pressure transmitter I and a flow limiting hole plate I; and the flushing oil user is a high-temperature oil pump, andthe isolation liquid user is a pressure detection instrument and / or a flow detection instrument. According to the high-temperature oil pump flushing oil and instrument isolation liquid supply systemand the working method thereof, a stable flushing medium can be provided for each high-temperature oil pump, and the flushing oil is used for cooling, lubricating, sealing and flushing a mechanical seal of a pump body, so that long-term stable operation of each pump is guaranteed; meanwhile, isolation liquid can be provided for an instrument pipeline provided with the pressure detection instrumentand the flow detection instrument, so that the situation that the detection instrument cannot work normally due to the fact that the detection instrument is in direct contact with a viscous and easily-coked process medium is avoided; and on the premise that normal work of the high-temperature oil pump and the detection instrument is guaranteed, the quality of a needle coke product is not influenced.

Description

Technical field [0001] The present invention relates to the technical field of chemical industry, in particular to a flushing oil used to maintain the safe and stable operation of a high-temperature oil pump in a delayed coking system, and to solve the problem of meter measurement failure caused by thick process media and easy coking and clogging. And instrument isolation fluid supply system and its working method. Background technique [0002] In chemical process systems, process media that is high temperature, viscous and even easy to coke are often involved. When transporting such media, high-temperature oil pumps are often used, and the equipment or pipelines for such media often need to set pressure, flow, etc. Testing instruments to monitor and guide the normal operation of the process system. [0003] In the delayed coking system, the process media include refined asphalt, mixed oil, coking heavy oil, etc., most of which are asphalt media, and their process characteristics ...

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Problems solved by technology

On the one hand, because the steam is affected by the conditions of the external steam pipe network, there are hidden dangers of steam pressure fluctuations and instability; on the other hand, during the process of purging the pressure guiding pipe, the steam continuously enters the oil-vapor system in the process pipeline , has an adverse effect on the quality of the product needle coke

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